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  1. ... similar to the case of the sun during sun rise or sun set. During moon rise, the light from the moon has to travel thicker atmosphere than when...

  2. The mass of the moon is about 1/80 of that of the earth. Since gravitational force is...earth is apparently stronger than the force due to the moon . As such, the point of "zero gravity", where the gravitational...

  3. The gravity of the moon is only about one-sixth that of the earth's: g earth=9.8 ms-2... that you can attain the same initial velocity on the moon , estimate the maximum height you can reach if you jump on the moon ...

  4. The moon is, in fact, attracted by the sun and revolves around it...attraction of the earth is just a perturbation to the the sun's attraction on the moon . Thus, the path of the moon , as viewed by an observer outise the solar...

  5. ...a) With X1 = 0.12X2, we have, the apparent magnitude of new moon is: - 12.5 - 10 log 0.12 = - 3.29 (b) With X1 = 30X2...

  6. ...he is able to exert. The astronaut would not become stronger onthe moon . He exerts the same force on the moon as he is on earth. ...

  7. ... for landing. However, atmosphere is absent in the Moon . So there is no air resistance for landing. Even the parachute...

  8. 雖然體重會承受部分重物的重量,但人的重量與手的承托力是沒有很大的關係的,因為拿重物時,所使用的力很大部分取決於手的承托力,而手的承托力是與肌肉的韌力成正比的,所以即使太空人在月球時的體重會減少,但唔會影響佢手的肌肉的韌力同手的承托力,所以他在月球可以拿到比地球更重...

  9. Weight is a force. No matter on which planet, weight is calculated by GMm/r^2 The max weight a person can lift depends on the person's physical ability only. So he can lift objects as heavy as on earth.

  10. ... Let 81m be the mass of EARTH and m be the mass of MOON G(81m)/d^2+[-G(m)/(3.8*10^8-d)^2]=0 G(81m)/d^2=G...

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