Foram encontradas 96 questões.
Um corpo, de massa igual a 6 kg, desloca-se sobre uma superfície horizontal, realizando movimento uniforme de acordo com a seguinte expressão S = 20t, onde S é a posição em metros e t é o tempo em segundos. De repente, esse corpo divide-se perfeitamente em dois fragmentos, um menor de massa igual a 2 kg e outro de massa igual a 4 kg, que continuam a se movimentar na mesma direção e sentido que o corpo originalmente se movimentava. O fragmento de menor massa tem velocidade quatro vezes maior que o outro. Considerando o sistema (corpo e fragmento) isolado, quais os valores das velocidades, em m/s, destes fragmentos?
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Leia:
“Se soubésseis o quanto era aprazível ouvir, mergulhar nas histórias de minha velha avó, _____ não só os ouvidos, mas cada centímetro do 'lado de dentro do corpo' a pulsar com tudo o que sua voz desenhava.”
Complete o espaço demarcado no texto com a correta conjugação do verbo pôr.
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The mistake
A photographer named John was flying first class from London to Nairobi in Kenya when one of the pilots came out of the cockpit to make some coffee in the microwave. He couldn’t get the machine to work, so he asked his fellow pilot to help him.
As the other pilot left the cockpit, he let the heavy metal door close behind him. The pilot started an urgent, whispered discussion with his colleague. The two pilots had locked themselves out of their cockpit and, as they told the photographer (who promised not to tell the other passengers), the door was fitted with a safety lock. This meant that not even the pilots could open it from outside the cockpit. John remembered that he had put his Swiss army knife in his hand luggage. However, he couldn’t remember where he had put his hand luggage and spent five minutes opening and closing overhead lockers until he found it. John and the pilots attacked the door with the knife, the lock started to come loose, and when they broke into the cockpit, the plane was cruising eastward over the Indian Ocean.
Adapted from American Inside Out - Student’s Book.
The word “whispered”, in bold, in the text, is closest in meaning to ________.
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A embalagem de um determinado produto é em forma de uma pirâmide hexagonal regular, cujas medidas internas são 13 cm de altura e 24 cm de perímetro da base. Assim, o volume interno dessa embalagem é ___ !$ \sqrt 3 !$ !$ cm^3 !$ .
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Seja f(x) = | 3x – 4 | uma função. Sendo a !$ \ne !$ b e f(a) = f(b) = 6, então o valor de a + b é igual a
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St Marteen: tourist killed by jet blast at caribean airport
A tourist has been killed after being knocked over by jet blast at an airport famous for its dangerous runway. The woman was watching a plane take off at Princess Juliana Airport on the island of St. Marteen when the blast of a Boeing 737 knocked her over. The tourist was standing by the fence at the end of the runway, watching the plane takes off when she fell and had head injuries. She was taken to hospital, where she died. The airport is one of the most dangerous in the world due to the location of its runway with a public beach at one end, and a mountain at the other. Between the beach and the airport there is a public road. Despite warning signs and requests from the airport to stay away from the runway they don’t obey and stay by the fence to feel the blast from planes as they take off.
Adapted from The Independent Online; July 13, 2017.
“Her”, underlined in the text, refers to the
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