Read this text about Yuri Gagarin.

Yuri was born on March 9, 1934 in Klushino, a small village 100 miles west of Moscow. His father was a cabinetmaker, carpenter, bricklayer, and farmer, and his mother was a milkmaid. Together they worked on a kolkhoz or collective farm. By Soviet social standards, his heritage was impeccable. He was the third of four children. During the war, the Nazis threw his family out of their home and took away two of his sisters. Yuri helped his parents dig a dugout where they lived untill the war was over, then the family moved to Gziatsk. 

[…] 

Yuri was subjected to extremely rigorous training: physical, mental, and psychological. He underwent long periods in a sensory deprivation chamber, experiments with weightlessness, endurance in heat chambers, and test flights under stress with every reaction monitored. […] 

"During the days of preparation for the launch, when everyone had more than his share of concerns, apprehensions, and anxieties, he alone seemed to keep calm. More than that: he was full of good spirits and beamed like the sun." 

On April 12, 1961 the first earthling escaped the gravity well of planet earth. In the spaceship Vostok 1, Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth one time at an altitude of 187 3/4 miles (302 kilometers) for 108 minutes at 18,000 miles an hour. He was the first man to see that the earth was indeed round, indeed mostly water, and indeed magnificent. 

Following his return to earth, Yuri's triumphant walk through Red Square in front of a crowd of hundreds of thousands made him more nervous and afraid than his historic flight. As he reached the podium, the awaiting Valya tearfully whispered in his ear, "Our dream has come true, Yuri." Embracing her he replied, "You're a smart girl! Thank you!" [...]

Russian Archives Online

Disponível em: <http://www.russianarchives.com/gallery/gagarin/>. Acesso em: 19 mar. 2014. (Fragmento)

Rewrite some clauses from the text in just one sentence and set the chronological order for the events according to the text. The beginning of each sentence was given.

A) Yuri helped his parents dig a dugout where they lived / the war was over.

Before the war was over, __________________________________________________________

______________________________________________________________________________

B) Yuri was subjected to extremely rigorous training / He underwent long periods in a sensory deprivation chamber. 

After Yuri had been subjected to extremely rigorous training ______________________________

______________________________________________________________________________

C) Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth one time at an altitude of 187 3/4 miles (302 kilometers) for 108 minutes at 18,000 miles an hour / the first earthling escaped the gravity well of planet earth 

When Senior Lieutenant Yuri Alexeyevich Gagarin orbited earth ___________________________

______________________________________________________________________________

______________________________________________________________________________

D) He reached the podium / the awaiting Valya tearfully whispered in his ear: "Our dream has come true, Yuri." 

After he had reached the podium, ___________________________________________________

______________________________________________________________________________

______________________________________________________________________________

  As maquinas térmicas foram aprimoradas durante a primeira Revolução Industrial, iniciada na Inglaterra no século XVIII. O trabalho do engenheiro Frances Nicolas Leonard Sadi Carnot, que notou a relação entre a eficiência da maquina a vapor e a diferença de temperatura entre o vapor e o ambiente externo, foi fundamental para esse aprimoramento.

A solução desenvolvida por Carnot para aumentar a eficiência da maquina a vapor foi

(FUVEST 2011 1° FASE) Uma menina, segurando uma bola de tênis, corre com velocidade constante, de módulo igual a 10,8 km/h, em trajetória retilínea, numa quadra plana e horizontal. Num certo instante, a menina, com o braço esticado horizontalmente ao lado do corpo, sem alterar o seu estado de movimento, solta a bola, que leva 0,5 s para atingir o solo.

As distâncias s_m e s_b percorridas, respectivamente, pela menina e pela bola, na direção horizontal, entre o instante em que a menina soltou a bola (t = 0 s) e o instante t = 0,5 s, valem:

Note e adote:

- Desconsiderar efeitos dissipativos.

(UEFS) O campo elétrico entre as placas mostradas na figura é E = 2,0.10⁴N/C e a distância entre elas é d = 7,0mm. Considere que um elétron seja liberado, a partir do repouso, nas proximidades da placa negativa, a carga do elétron em módulo igual a 1,6.10^-19C e a sua massa igual 9,1.10^-31kg.

Nessas condições, o módulo da velocidade do elétron, em m/s, ao chegar à placa positiva, é de

 Texto base: Observe os ângulos indicados na figura a seguir.

Marque a alternativa CORRETA relativa à classificação desses ângulos.