← Voltar para a lista de provas Academia da Força Aérea — Comando da Aeronáutica · Cadete — Cursos de Formação de Oficiais Aviadores, Intendentes e de Infantaria (CFOAV/CFOINT/CFOINF) 65 questões nesta prova · página 3 de 4 · 64 com gabarito Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Rendimentos: máquina 1 = 37,5%; máquina 2 ≈ 56,9%. Só I e III são corretas. Máquina 1: 500 K e 800 K, então η = 1 − 500/800 = 0,375. Máquina 2: 227 K e 527 K, então η = 1 − 227/527 ≈ 0,569. Assim I é verdadeira. Em III, Q_f = 4000·227/527 ≈ 1723 J, aproximadamente 1720 J, também verdadeira. II é falsa: Q = 2000/0,375 ≈ 5333 J, não 6000 J. IV é falsa: para o mesmo Q_q, a máquina 2, de maior rendimento, rejeita menos calor. Logo só I e III estão corretas (B). Referência: Termodinâmica – ciclo de Carnot Resolução comentada do VaiConcursos. Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponível Gabarito disponívelAFA — Exame de Admissão ao CFOAV/CFOINT/CFOINF 2014 — Língua Portuguesa, Matemática, Língua Inglesa, Física e Redação — Versão A
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
Choose the alternative containing the correct verbal tenses to complete the gaps (1) and (2) in the text.
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
One of the main reasons of the Al Qaeda attacks was
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
Consider the following statements based on the text.
I. Almost three thousand people were saved in the World Trade Center.
II. The hijackers of the United Flight 93 plane circled over downtown in Washington, D.C.
III. A fire extinguisher is supposed to be the weapon used by the passengers to attack the hijackers.
IV. The North tower was the second giant concrete building to collapse.
The correct ones are only
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
According to the text, “some terrorists had lived in the United States for more than a year […]”. It means that the terrorists
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
The word “meanwhile” (paragraph 5) indicates in the text that
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
The verb “learned” (line 62) has the same meaning as
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
The sentence “Thomas Burnett Jr. told his wife over the phone that ‘I know that we’re all going to die’ ” is similar in meaning to
Thomas Burnett Jr.
Directions: Answer questions 41 to 48 based on TEXT II.
TEXT II
SEPTEMBER 11
On September 11, 2001, nineteen militants
associated with the Islamic extremist group al-Qaeda
hijacked four airlines and carried out suicide attacks
against targets in the United States. Two of the planes
5 were flown into the towers of the World Trade Center in
New York City, a third plane hit the Pentagon just outside
Washington, D.C., and the fourth plane crashed in a field
in Pennsylvania. Often referred to as 9/11, the attacks
resulted in extensive death and destruction, activating
10 major U.S. initiatives to combat terrorism and defining
the presidency of George W. Bush. Over three thousand
people were killed during the attacks in New York City
and Washington, D.C., including more than four hundred
police officers and firefighters.
15 At 8:45 a.m., on a clear Tuesday morning, an
American Airlines Boeing 767 loaded with twenty
thousand gallons of jet fuel crashed into the north tower
of the World Trade Center in New York City. The impact
left a wide, burning hole near the 80th floor of the 110-
20 story skyscraper, instantly killing hundreds of people and
trapping hundreds more in higher floors. Eighteen
minutes after the first plane hit, a second Boeing 767–
United Airlines Flight 175–appeared out of the sky,
turned sharply toward the World Trade Center and
25 crashed into the south tower near the 60th floor. The
collision caused a massive explosion that showered
burning fragment over surrounding buildings and the
streets below. America was under attack.
The attackers were Islamic terrorists from Saudi
30 Arabia and several other Arab nations. Reportedly
financed by Saudi fugitive Osama bin Laden's al-Qaeda
terrorist organization, they _____________(1) in
retaliation for America's support of Israel, its involvement
in the Persian Gulf War and its continued military
35 presence in the Middle East. Some of the terrorists had
lived in the United States for more than a year and
_____________(2) flying lessons at American
commercial flight schools.
As millions watched the events unfolding in New
40 York, American Airlines Flight 77 circled over downtown
Washington, D.C., and banged into the west side of the
Pentagon military headquarters at 9:45 a.m. Jet fuel from
the Boeing 757 caused a devastating inferno that led to
the structural collapse of a portion of the giant concrete
45 building. Less than fifteen minutes after the terrorists
struck the nerve center of the U.S. military, the horror in
New York took a catastrophic turn for the worse when
the south tower of the World Trade Center collapsed in a
massive cloud of dust and smoke. At 10:30 a.m., the
50 other Trade Center tower collapsed. Close to three
thousand people died in the World Trade Center and its
vicinity, including an impressive three hundred and forty
three firefighters and paramedics, twenty three New York
City police officers and thirty seven Port Authority police
55 officers who were struggling to complete an evacuation
of the buildings and save the office workers trapped* on
higher floors.
Meanwhile, a fourth California-bound plane–
United Flight 93–was hijacked about forty minutes after
60 leaving Newark International Airport in New Jersey.
Because the plane had been delayed in taking off,
passengers on board learned of events in New York and
Washington via cell phone calls to the ground. Knowing
that the aircraft was not returning to an airport as the
65 hijackers claimed, a group of passengers and flight
attendants planned a rebellion. One of the passengers,
Thomas Burnett Jr., told his wife over the phone that "I
know we're all going to die. There are three of us who
are going to do something about it. I love you, honey."
70 Another passenger–Todd Beamer–was heard saying
"Are you guys ready? Let's roll" over an open line.
The passengers fought the four hijackers and
are suspected to have attacked the cockpit with a fire
extinguisher. The plane then flipped over and sped
75 toward the ground, crashing in a rural field in western
Pennsylvania at 10:10 a.m. All forty-five people aboard
were killed. Within two months, U.S. forces had
effectively removed the Taliban from operational power,
but the war continued. Osama bin Laden, was finally
80 chased and killed by U.S. forces in Abbottabad,
Pakistan.
Adapted from http://www.history.com/topics/9-11-attacks
Acessado em 04/04/2013
Glossary:
*Trapped – to be in a bad situation that is difficult to escape.
Mark the right option to complete the statement.
If the plane hadn’t been delayed in taking off, the passengers …………… about the events in New York and Washington.
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um motociclista, pilotando sua motocicleta, move-se com velocidade constante durante a realização do looping da figura abaixo.
Quando está passando pelo ponto mais alto dessa trajetória circular, o motociclista lança, para trás, um objeto de massa desprezível, comparada à massa de todo o conjunto motocicleta-motociclista. Dessa forma, o objeto cai, em relação à superfície da Terra, como se tivesse sido abandonado em A, percorrendo uma trajetória retilínea até B. Ao passar, após esse lançamento, em B, o motociclista consegue recuperar o objeto imediatamente antes dele tocar o solo.
Desprezando a resistência do ar e as dimensões do conjunto motocicleta-motociclista, e considerando π² = 10, a razão entre a normal (N), que age sobre a motocicleta no instante em que passa no ponto A, e o peso (P) do conjunto motocicleta-motociclista, (N/P), será igual a
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um bloco, de massa 2 kg, desliza sobre um plano inclinado, conforme a figura seguinte.
O gráfico v x t abaixo representa a velocidade desse bloco em função do tempo, durante sua subida, desde o ponto A até o ponto B.
Considere a existência de atrito entre o bloco e o plano inclinado e despreze quaisquer outras formas de resistência ao movimento. Sabendo que o bloco retorna ao ponto A, a velocidade com que ele passa por esse ponto, na descida, em m/s, vale
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
A figura abaixo mostra um sistema em equilíbrio estático, formado por uma barra homogênea e uma mola ideal que estão ligadas através de uma de suas extremidades e livremente articuladas às paredes.
A barra possui massa m e comprimento L₀, a mola possui comprimento natural L₀ e a distância entre as articulações é de 2L₀.
Esse sistema (barra-mola) está sujeito à ação da gravidade, cujo módulo da aceleração é g e, nessas condições, a constante elástica da mola vale
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Dispõe-se de duas máquinas térmicas de Carnot. A máquina 1 trabalha entre as temperaturas de 227 °C e 527 °C, enquanto a máquina 2 opera entre 227 K e 527 K.
Analise as afirmativas a seguir e responda ao que se pede.
I. A máquina 2 tem maior rendimento que a máquina 1.
II. Se a máquina 1 realizar um trabalho de 2000 J terá retirado 6000 J de calor da fonte quente.
III. Se a máquina 2 retirar 4000 J de calor da fonte quente irá liberar aproximadamente 1720 J de calor para a fonte fria.
IV. Para uma mesma quantidade de calor retirada da fonte quente pelas duas máquinas, a máquina 2 rejeita mais calor para a fonte fria.
São corretas apenasResolução comentada
Análise das alternativas
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um corpo homogêneo e maciço de massa M e coeficiente de dilatação volumétrica constante γ é imerso inicialmente em um líquido também homogêneo à temperatura de 0 ºC, e é equilibrado por uma massa m₁ através de uma balança hidrostática, como mostra a figura abaixo.
Levando o sistema formado pelo corpo imerso e o líquido até uma nova temperatura de equilíbrio térmico x, a nova condição de equilíbrio da balança hidrostática é atingida com uma massa igual a m₂, na ausência de quaisquer resistências.
Nessas condições, o coeficiente de dilatação volumétrica real do líquido pode ser determinado por
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um estudante, ao repetir a experiência de James P. Joule para a determinação do equivalente mecânico do calor, fez a montagem da figura abaixo.
Para conseguir o seu objetivo, ele deixou os corpos de massas M₁ = 6,0 kg e M₂ = 4,0 kg caírem 40 vezes com velocidade constante de uma altura de 2,0 m, girando as pás e aquecendo 1,0 kg de água contida no recipiente adiabático. Admitindo que toda a variação de energia mecânica ocorrida durante as quedas dos corpos produza aquecimento da água, que os fios e as polias sejam ideais e que o calor específico da água seja igual a 4,0 J/g°C, o aumento de temperatura dela, em °C, foi de
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Considere um gás ideal que pode ser submetido a duas transformações cíclicas reversíveis e não simultâneas, 1 e 2, como mostrado no diagrama PV abaixo.
Na transformação 1 o gás recebe uma quantidade de calor Q₁ de uma fonte quente à temperatura T₁ e cede a quantidade de calor Q₂ para a fonte fria à temperatura T₂.
Enquanto que, na transformação 2, as quantidades de calor recebida, Q’₁, e cedida, Q’₂, são trocadas respectivamente com duas fontes às temperaturas T₃ e T₄.
Nessas condições, é correto afirmar que
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
A figura abaixo apresenta os gráficos da posição (x) em função do tempo (t) para dois sistemas A e B de mesma massa m que oscilam em MHS, de igual amplitude.
Sendo E_CA e E_CB as energias cinéticas dos sistemas A e B respectivamente no tempo t₁; E_PA e E_PB as energias potenciais dos sistemas A e B respectivamente no tempo t₂, é correto afirmar que
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um pequeno objeto plano e luminoso pode ser utilizado em três arranjos ópticos distintos (I, II e III), imersos em ar, como apresentado na figura abaixo.
No arranjo I, o objeto é colocado sobre um plano onde se apoiam dois espelhos planos ortogonais entre si. Nos arranjos II e III, respectivamente, o objeto é disposto de forma perpendicular ao eixo óptico de um espelho esférico côncavo gaussiano e de uma lente convergente delgada. Dessa maneira, o plano do objeto se encontra paralelo aos planos focais desses dois dispositivos. Considere que as distâncias do objeto ao vértice do espelho esférico e ao centro óptico da lente sejam maiores do que as distâncias focais do espelho côncavo e da lente.
Nessas condições, das imagens abaixo, a que não pode ser conjugada por nenhum dos três arranjos ópticos é
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Um estudante montou um experimento com uma rede de difração de 1000 linhas por milímetro, um laser que emite um feixe cilíndrico de luz monocromática de comprimento de onda igual a 4·10⁻⁷ m e um anteparo, conforme figura abaixo.
O espectro de difração, observado no anteparo pelo estudante, foi registrado por uma câmera digital e os picos de intensidade apareceram como pequenos pontos brilhantes na imagem.
Nessas condições, a opção que melhor representa a imagem do espectro de difração obtida pelo estudante é:
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Três cargas elétricas puntiformes q_A, q_B e q_C estão fixas, respectivamente, nos vértices A, B e C de um triângulo isósceles, conforme indica a figura abaixo.
Considerando F_A o módulo da força elétrica de interação entre as cargas q_A e q_C; F_B o módulo da força elétrica de interação entre as cargas q_B e q_C e sabendo-se que a força resultante sobre a carga q_C é perpendicular ao lado AB e aponta para dentro do triângulo, pode-se afirmar, certamente, que a relação entre os valores das cargas elétricas é
g = 10 m/s²
sen 37º = 0,6
cos 37º = 0,8
Uma partícula A, de massa m e carga elétrica q, está em repouso no momento em que uma segunda partícula B, de massa e carga elétrica iguais às de A, é lançada com velocidade de módulo igual a v₀, na direção x, conforme ilustra a figura abaixo.
A partícula B foi lançada de um ponto muito distante de A, de tal forma que, no instante do lançamento, as forças elétricas coulombianas entre elas possam ser desprezadas.
Sendo K a constante eletrostática do meio e considerando apenas interações eletrostáticas entre essas partículas, a distância mínima entre A e B será igual a
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