Foram encontradas 125 questões.
Em uma galáxia muito distante, dois planetas de massas iguais a 3 . 1024 kg e 2 . 1022 kg, estão localizados a uma distância de 2 . 105 km um do outro.
Admitindo que a constante de gravitação universal G vale 6,7 . 10-11 N . m2/kg2, determine a intensidade, em N, da força gravitacional entre eles.
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Jade Barbosa lost her mother when she was just nine years old. At thirteen she had to leave her father and brother in Rio to train at the Curitiba training center. At just sixteen she is the new star of Brazilian gymnastics. In the Pan American Games she won one gold medal, one silver and one bronze.
(Taken from Maganews – October 2007)
According to the text, it is not true to say that
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Different ways of talking
Both Joy and Tommy are growing up in the culture of the United States. They are learning what it means to be a girl and a boy in this culture. Their sex at birth, female or male, is now becoming a gender – a way of thinking, speaking, and acting that is considered feminine or masculine. Each culture has its own way of defining gender, and very early in life gender becomes a basic part of a person’s identity.
In the United States and Canada, boys and girls usually play in the same sex groups. Boys play in large groups in which every boy knows his place.
Some are leaders; others are followers. Many boys like to get attention by boasting, or talking how well they can do things.
Girls, on the other hand, usually play in smaller groups. They may be interested in playing fairly and taking turns. For example, when jumping rope, the rope-holders always take their turn jumping.
Dr.Tannen, a professor at Georgetown University, has found that these differences are reflected in the ways that children use language while they play. Boys often use commands when they talk to each other while girls use the form “let’s” when they want to express their preferences, emphasizing the fact that all of them belong to the same group.
These differences seem to be part of growing up in the culture of the United States. If men and women can understand that many of their differences are cultural, not personal, they may be able to improve their relationships and understand that there is more than one way to communicate.
According to the text,
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This week Teen Magazine’s competition is for all you young inventors. Do you have any good ideas? If you answered yes, make a drawing and describe your invention; then send us the design.
There is a prize _____ the best idea.
Choose the best alternative to have the text completed:
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Uma força, de módulo F, foi decomposta em duas componentes perpendiculares entre si. Verificou-se que a razão entre os módulos dessas componentes vale !$ \sqrt{3}. !$
.O ângulo entre esta força e sua componente de maior módulo é de:
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Considere as igualdades:
I- tg 10° = tg (– 10°)
II- tg 770° = – tg 50°
III- sen 250° = sen 20°
IV- sen 460° = sen 100°
O número de igualdades verdadeiras é
Provas
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Um equipamento eletrônico foi entregue na Sala de Física da Escola de Especialistas de Aeronáutica, porém, na etiqueta da caixa estava escrito que o equipamento deveria funcionar sob uma temperatura de 59 ºF. Logo, os professores providenciaram um sistema de refrigeração, que deveria ser ajustado em valores na escala Celsius. Portanto, a temperatura correta que o sistema deve ser ajustado, em ºC, é de:
Provas
Questão presente nas seguintes provas
Different ways of talking
Both Joy and Tommy are growing up in the culture of the United States. They are learning what it means to be a girl and a boy in this culture. Their sex at birth, female or male, is now becoming a gender – a way of thinking, speaking, and acting that is considered feminine or masculine. Each culture has its own way of defining gender, and very early in life gender becomes a basic part of a person’s identity.
In the United States and Canada, boys and girls usually play in the same sex groups. Boys play in large groups in which every boy knows his place.
Some are leaders; others are followers. Many boys like to get attention by boasting, or talking how well they can do things.
Girls, on the other hand, usually play in smaller groups. They may be interested in playing fairly and taking turns. For example, when jumping rope, the rope-holders always take their turn jumping.
Dr.Tannen, a professor at Georgetown University, has found that these differences are reflected in the ways that children use language while they play. Boys often use commands when they talk to each other while girls use the form “let’s” when they want to express their preferences, emphasizing the fact that all of them belong to the same group.
These differences seem to be part of growing up in the culture of the United States. If men and women can understand that many of their differences are cultural, not personal, they may be able to improve their relationships and understand that there is more than one way to communicate.
“every boy knows his place”, means that
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Na figura, o ponto P representa um número complexo, cujo conjugado é
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Um raio de luz monocromático incide sobre a superfície de uma lâmina de vidro de faces paralelas, formando um ângulo y com a normal, conforme a figura. Sabendo que o ângulo de refração na primeira face vale x e que o raio de luz que incide na segunda face forma com esta um ângulo de 60º, determine o valor de y.
Admita:
- A velocidade da luz no vácuo e no ar igual a c;
- A velocidade da luz no vidro igual a !$ ^C/_{\sqrt{2}} !$;
- O índice de refração do ar igual a 1,0.
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