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Q2566486
Física
Em acidentes de automóveis, inúmeras lesões graves e mortes são evitadas devido ao uso, por parte de condutores e
passageiros, do cinto de segurança. A atuação do cinto de
segurança está relacionada com a primeira lei de Newton,
segundo a qual
Q2566485
Física
Entre os corredores de rua, o termo pace é utilizado para
indicar o intervalo de tempo em que o corredor percorre a
distância de 1,0 km. Um corredor que, durante uma corrida,
teve pace médio de 5,0 min, desenvolveu, nessa corrida, a
velocidade média de
Q2566484
Matemática
Em uma progressão aritmética de razão positiva, o primeiro
termo é 12, a diferença entre os termos a9
e a2
é 126, e a soma
do 100º termo com o 200º termo é igual a 283x + 11. O valor
de x é
Q2566483
Matemática
Uma das arestas de um paralelepípedo reto-retângulo mede
20 cm e uma de suas faces tem perímetro igual a 36 cm. Se
o volume desse paralelepípedo é 1120 cm3
, sua área total é
Q2566482
Matemática
Na figura, o quadrado EFGI tem área 16 cm2
. O triângulo AEF
é retângulo em E e tem área 6 cm2
; o retângulo FBHG tem
área 12 cm2
; o trapézio CGIJ é retângulo em G e em I e tem
área 12 cm2
; e o paralelogramo EIDK tem área 16 cm2
.
Sabendo que o triângulo DLC é retângulo em L, a área do quadrilátero ABCD é
Sabendo que o triângulo DLC é retângulo em L, a área do quadrilátero ABCD é
Q2566481
Matemática
Um triângulo retângulo ABC e um triângulo BCD têm o lado BC em comum, conforme mostra a figura.
Sabendo que cos α = 79/110 e que a medida do segmento BD é
10 cm, o valor de cos β é
Q2566480
Matemática
Seja x o número real tal que 12x
= 3. Em função de x, o valor
do log3
864 é
Q2566479
Matemática
O gráfico de uma função quadrática f contém os pontos (0, 7) e (4, 23).
Sabendo que f(10) = 167, o menor valor assumido por essa função é
Q2566478
Matemática
Um total de 232 caixas de remédios foi enviado para 3 postos de saúde, denominados X, Y e Z. O posto X recebeu um
número de caixas igual à terça parte do número de caixas
recebidas pelos postos Y e Z juntos. Se o posto Z recebeu 30
caixas a mais do que o posto X, o número de caixas recebidas pelo posto Y foi
Q2566477
Matemática
No plano cartesiano, uma circunferência intersecta os eixos
coordenados nos pontos de coordenadas (0, 0), (0, 4) e (8, 0),
conforme mostra a figura, que também exibe o ponto P(7, 1).
A equação da reta que passa pelo centro da circunferência e por P é
A equação da reta que passa pelo centro da circunferência e por P é
Q2566476
Matemática
Hoje, a média aritmética das idades de um grupo de 20 amigos é igual a 29 anos. Todos esses amigos já concluíram o
ensino superior (ES), de maneira que o mais novo desses
amigos concluiu o ES com 25 anos, o mais velho o concluiu
há 2 anos e todos os demais amigos concluíram o ES quando tinham 26 anos. Seja t1
, t2
, t3
, …, t20 os respectivos tempos, em anos, que cada amigo tem desde que concluiu o ES.
A média aritmética desses 20 tempos ti (1 ≤ i ≤ 20) é 2,8 anos;
logo, hoje, a idade do mais velho desses amigos é
Q2566475
Matemática
Um prédio comercial tem 8 andares, com 5 salas comerciais
em cada andar. Considere que 3 pessoas cheguem a esse
prédio, sendo igualmente provável que o destino de cada
uma delas seja qualquer uma das salas do prédio. A probabilidade de essas 3 pessoas irem ao mesmo andar mas se
dirigirem a 3 salas diferentes desse andar é
Q2566474
Matemática
Considere o polinômio P(x) = x4
– 9x3 + 13x2 + dx – 50, em
que d é uma constante real. Sabendo que 5 é uma raiz de
multiplicidade 2 desse polinômio e que m e n são as outras
duas raízes, tais que m – n = 3, a soma m + d é igual a
Q2566473
Matemática
Em um grupo de 500 pessoas, algumas já haviam doado sangue e as demais nunca haviam doado. Como resultado de
uma campanha de conscientização, 30% das pessoas desse
grupo que nunca haviam doado sangue fizeram uma doação.
Após a campanha, o número de pessoas que já haviam feito
uma doação de sangue correspondeu a 37% do total de pessoas nesse grupo. O número de doadores de sangue desse
grupo antes da campanha era
Q2566472
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
No trecho do quarto parágrafo “if it melts beyond a certain
point”, o termo sublinhado refere-se a
Q2566471
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
O trecho do texto que está representado no gráfico é:
Q2566470
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
O trecho do segundo parágrafo “that change has not occurred
evenly: the poles are warming faster than regions in the
middle of the globe” consiste de duas partes. A segunda parte
estabelece
Q2566469
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
No trecho do segundo parágrafo “However, that change has
not occurred evenly”, o termo sublinhado pode ser substituído,
sem alteração de sentido, por
Q2566468
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
The first paragraph informs that
Q2566467
Inglês
Texto associado
At the beginning of March 1898, a Belgian research
ship became stuck in the ice of Antarctica’s Bellingshausen
sea. The Belgica ship and its crew — which included Roald
Amundsen, who later became the first man to reach the
South Pole — remained there for a year. Scientists aboard
Polarstern, a German research ship currently in the same
place, have a very different view: in the beginning of February
2023, the expedition leader said he had never seen the sea so
destituted of ice. In 2023, on February 13th, sea ice across the
Antarctic as a whole reached 1.91 million square kilometres
(m km2
), the lowest level since satellite records began in 1979.
The world is now, on average, 1.0-1.3 ºC hotter than it
was before the Industrial Revolution. However, that change
has not occurred evenly: the poles are warming faster than
regions in the middle of the globe.
Sea-ice extent around Antarctica was relatively stable
until 2014. It has been declining sharply since then. One study
by a climatologist at America’s National Aeronautics and
Space Administration (NASA) considers that between 2014
and 2017 Antarctic sea ice receded three times as quickly as
during any comparable period in the Arctic. Antarctic sea ice
shrinks to a minimum during late February and early March,
during the southern hemisphere’s summer. It hit record lows
in 2022 and again now in 2023.
These changes have prompted much research into how
global warming is affecting Antarctica. The biggest concern is
over the enormous West Antarctic ice sheet, which is smaller
but less stable than its eastern counterpart. Scientists say that
it risks collapse if it melts beyond a certain point, which could
result in a global sea-level rise of up to three metres. It is
unlikely to happen any time soon, but increasing evidence of
instability in Antarctica’s ice sheets is cause for concern.
(www.economist.com, 20.02.2023. Adaptado.)
The text mainly intends to show that
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