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  1. ...proportional constant. For the satellite: 90^2 = kR^3 ---------- (1) For the moon : T^2 = k(Rm)^3 ------------- (2) where T is the period of...

  2. ...speed can remain unchanged. One of the examples is the Moon moving around the Earth. The Earth is always...

  3. ...'s 3rd Law, let d be the distance between th earth centre and moon centre hence, (28/1)^2 = (d/6.6R)^3 where 28 days is...

  4. ...quot; =嫦娥一號's "Chang'e Flying to the Moon " is a popular Chinese mythology about a lady Chang'e who flew to the Moon after ...

  5. ...acceleration due to gravity) hence, s = u^2/2g A lower value of g on the moon indicates a larger value for s (height reached) than on earth...

  6. ...an apparent movement of the Sun with respect to the stars at a rate of about 1°/day (or a Sun or Moon diameter every 12 hours) eastward. Because of this motion, on average it...

  7. 1. The answer is option A.The moon only reflects light from the sun. 2. Since incident angle = reflection angle...

  8. ... of a degree above absolute zero (i.e. 10^-5 K). A black hole about the mass of the Moon has a temperature of 2.7 K Since black holes ...

  9. ...係會比大氣層absorb?點解microwave可以由earth send 去 moon ? A: In theory, almost all frequencis...within the radio frequency range, waves of frequency below about 10 MHz normally cannot penetrate the ionosphere...

  10. ... the pole, the object is NOT performing any circular motion about the earth's centre and hence NO centripetal force is ...

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