Foram encontradas 96 questões.
Dois vetores !$ V_1 !$ e !$ V_2 !$ formam entre si um ângulo !$ θ !$ e possuem módulos iguais a 5 unidades e 12 unidades, respectivamente. Se a resultante entre eles tem módulo igual a 13 unidades, podemos afirmar corretamente que o ângulo !$ θ !$ entre os vetores !$ V_1 !$ e !$ V_2 !$ vale:
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Questão presente nas seguintes provas
Considerando as velocidades de propagação da luz em dois meios homogêneos e distintos, respectivamente iguais a 200.000km/s e 120.000km/s, determine o índice de refração relativo do primeiro meio em relação ao segundo. Considere a velocidade da luz no vácuo, igual a 300.000km/s.
Provas
Questão presente nas seguintes provas
Considere que o número de células de um embrião, contadas diariamente desde o dia da fecundação do óvulo até o 30° dia de gestação, forma a sequência: 1, 2, 4, 8, 16... A função que mostra o número de células, conforme o número de dias x, é !$ f: \{ x \in \mathrm{I\!N}; 1 \le x \le 30 \}\rightarrow \mathrm{I\!N}; f(x)= !$
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Questão presente nas seguintes provas
Read the text and answer question.
It was a beautiful summer afternoon with the sun shining brightly. I excitedly phoned my friends asking them to come over later for a barbecue.
After making the calls I quickly drove into town to buy some food and drink. when I arrived at the shops I was very surprised at how busy it was. Everyone must have been shopping for a barbecue!
The first butchers I visited had completely run out of sausages. The next shop had some left so I happily bought some. After visiting a few more shops I had finally finished my shopping. But I was starting to worry as it was 6 p.m. and I had invited my friends to visit at 6:30 p.m.
I hastly rushed to the car park with all of my shopping and threw it in the boot. Suddenly I notice that the cars were moving really slowly out of the car park and there was a bit of traffic jam. It was past 6:30 p.m. when I arrived home and I was extremely worried. As a drove into my drive I smiled happily when I saw my friends sitting in my front garden. Luckily they had realized I was stuck at the shops and they waited for me.
Fonte: www.bbc.co.uk/skillswise
The four words in bold, in the text, are:
Provas
Questão presente nas seguintes provas
Seja a equação polinomial !$ x^3+bx^2+cx+18=0 !$ . Se !$ -2 !$ e !$ 3 !$ são suas raízes, sendo que a raiz 3 tem multiplicidade 2, o valor de “b” é
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Questão presente nas seguintes provas
O segmento !$ \overline{AT} !$ é tangente, em T, à circunferência de centro !$ O !$ e raio !$ R = 8 !$ cm. A potência de A em relação à circunferência é igual a ______ !$ cm^2 !$.
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Questão presente nas seguintes provas
Choose the best alternative to complete the dialogue.
Jane: Hi Susan, how are you doing?
Susan: Everything is Okay!
Jane: Do you have any plans for this weekend?
Susan: Not sure… I ______ probably give a party this weekend.
Jane: Cool!
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Questão presente nas seguintes provas
Choose the alternative that corresponds to the Active Voice of the following sentence: “Great recipes are made by Carole Walter”.
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Questão presente nas seguintes provas
Read the text and answer question.
Alberto Santos Dumont (1873-1932) was born in Brazil and educated in Paris. He made his first balloon ascent in 1898 and, soon after that, began constructing dirigible airships. In 1901 he won a Paris air race and international fame. (After the race, he asked Louis Cartier for a timepiece that would keep his hands free - the first wristwatch.)
Turning to heavier-than-air machines, Santos Dumont built his 14-Bis in 1906, three years after the Wright brothers’ initial flight. His flight was the first in Europe, and his plane was the first anywhere to lift off the ground under its own power. In 1909 Santos Dumont designed the Demoiselle monoplane, the first modern light plane.
In 1901 Santos Dumont fell ill with multiple sclerosis and retired from flying. He returned to Brazil in 1916. Ill and despondent over the use of aircraft in warfare, he committed suicide in 1932.
(Adapted From “Leaders of the Century”)
The words balloon, plane and dirigible airships, in bold in the text, are different kinds of ______________.
Provas
Questão presente nas seguintes provas
Read the text and answer the question.
Renata, from Brazil: I just kiss them on the cheek. Just one kiss, because I’m from São Paulo. I have friends from Rio and they always kiss twice.
Guillermo, from Chile: When it’s the first time I’m meeting someone or in formal situations, I shake hands. With my male friends, I give them a hug or a pat on the back but If I’m greeting a female friend, it’s different: I give her a kiss on the cheek and sometimes I hug her. Women greet each other the same way: kissing and sometimes hugging.
Marco, from Italy: I shake hands in formal situations. Where I live, kissing is acceptable. It’s OK for men to kiss each other, for men to kiss women or for women to kiss each other. But with my male friends I usually just give a hug or a pat on the back.
Molly, from the USA: When I greet close friends I give them a hug. For casual friends, I just say “Hi”. For men it’s a little different. Where I live they never hug each other, it’s just “Hey, man”. In formal situations I always shake hands, and it’s important to shake hands firmly. When I’m saying good-bye to people I’m not very close to, I also shake hands, be it a man or a woman. Kissing is not usual around here, unless it’s among really close family members.
Adapted from www.rachacuca.com.br
According to the text, choose the best alternative.
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Questão presente nas seguintes provas
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