Química e Física Exp.
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Thayssa Lemos
8º
23/10/15
Observações:
Só será permitido o uso de caneta azul ou preta.
Questões rasuradas serão desconsideradas.
Questões a lápis não serão corrigidas.
O Desenvolvimento dos exercícios que envolverem
cálculos poderá ser a lápis, mas o resultado deverá
ser de caneta azul ou preta.
1. O que diz a 1ª Lei de Newton?
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2. O que diz a 2ª Lei de Newton?
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3. O que diz a 3ª Lei de Newton?
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4. O que é Eletroestática?
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5. O que é Gravidade?
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6. Três blocos, A, B e C, deslizam sobre uma superfície horizontal cujo atrito com estes corpos é desprezível, puxados
por uma força F de intensidade 8,0N.
A aceleração do sistema é de 0,80m/s2 , e as massas de A e B são respectivamente 4,0kg e 3,0kg. A massa do
corpo C vale, em kg?
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7. Sobre uma mesa horizontal sem atrito, dois blocos são ligados, por uma corda de massa desprezível, e puxados por
uma força de intensidade F = 90 N. A aceleração do sistema tem módulo 5,0 m/s2 e a massa m2é de 9,0 kg. A
massa m1 é, em kg é?
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8. Descreva o ciclo do oxigênio.
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9. Descreva o ciclo da água.
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10. Fale sobre aquecimento global (No mínimo 5 linhas).
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