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Author Question: An astronaut lands on a previously unknown planet of radius 2350. km and she measures the ... (Read 77 times)

cagreen833

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on: Jul 27, 2018
An astronaut lands on a previously unknown planet of radius 2350. km and she measures the acceleration of gravity to be 3.20 m/s2.
 
  (a) What is the mass of this new planet?
  (b) What does the astronaut weigh on this new planet if she weighs 384. N on Earth?

Question 2

What is the minimum energy needed to lift 1.0 kg to a height of 200. km and to give it a speed of 8.0 km/s? (Neglect the small decrease of g over that distance.)
 
  A) 34. TJ
  B) 34. kJ
  C) 34. MJ
  D) 34. GJ
  E) 34. J


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wergv

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Reply #1 on: Jul 27, 2018
Answer to Question 1

(a) 0.26  1024 kg
(b) 125. Newtons

Answer to Question 2

C


cagreen833

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

aliotak

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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