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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on the vocabulary and linguistic aspects of text CB1A2-I, judge the following item.
The word “installment” (first sentence of the first paragraph) means, in the context of text CB1A2-I, “to make it ready to use”.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on the vocabulary and linguistic aspects of text CB1A2-I, judge the following item.
The word “overshadowed” (first sentence of the second paragraph) means, in the context of text CB1A2-I, “made less noticeable”.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
The pronoun “they” (last sentence of the last paragraph) refers to the word “assumptions”.
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Questão presente nas seguintes provas
Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on text CB1A2-I, judge the following item.
Hartland Snyder helped Oppenheimer write his least relevant paper in physics.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on text CB1A2-I, judge the following item.
The word “war” (first sentence of the second paragraph) refers to any war.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on text CB1A2-I, judge the following item.
With the help of his students, Oppenheimer could easily shift from one research topic to another.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on text CB1A2-I, judge the following item.
According to Cathryn Carson, Oppenheimer’s work on neutron stars and black holes was meaningless at the time it was developed.
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Text CB1A2-I
Oppenheimer’s brief advance into astrophysics began with
a 1938 paper about neutron stars, which continued in a 1939
installment that further incorporated the principles of Einstein’s
general theory of relativity. He then published a third paper on
black holes on September 1st, 1939—but at the time, it was
scarcely noticed because this was the very day Germany invaded
Poland, launching World War II. Oppenheimer never wrote on
the topic again.
Even if it hadn’t been overshadowed by war,
Oppenheimer’s work on neutron stars and black holes “was not
understood to be terribly significant at the time,” says Cathryn
Carson, a historian of science at the University of California,
Berkeley.
Each paper was written with a different member of the
swarm of graduate students that Oppenheimer carefully
cultivated. These protégés facilitated his ability to jump between
research topics—and ultimately, helped him develop some of his
most important contributions to physics.
Oppenheimer’s climactic third paper, written with his
student Hartland Snyder, explores the implications of general
relativity on the universe’s most massive stars. Although the
physicists needed to include some assumptions to simplify the
question, they determined that a large enough star would
gravitationally collapse indefinitely—and within a finite amount
of time, meaning that the objects we now know as black holes
could exist.
Internet: <scientificamerican.com> (adapted)
Based on text CB1A2-I, judge the following item.
Oppenheimer’s paper on black holes received little attention at the time it was published.
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O tráfego de veículos em dois cruzamentos é ilustrado
pelo diagrama a seguir, em que as setas indicam o sentido do
tráfego e x, y, z, a, b, c e d expressam as quantidades de veículos
por hora que passam nos cruzamentos.
A partir dessas informações, e considerando z = y, julgue o item seguinte.
Se a = 600, b = 150, c = 300 e d = 450, então o valor de x + y + z é inferior a 1.200.
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O tráfego de veículos em dois cruzamentos é ilustrado
pelo diagrama a seguir, em que as setas indicam o sentido do
tráfego e x, y, z, a, b, c e d expressam as quantidades de veículos
por hora que passam nos cruzamentos.
A partir dessas informações, e considerando z = y, julgue o item seguinte.
Se a = b = d = 100, então o valor de c não pode ser superior a 300.
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