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Mass of a planet/sun

  • Thread starter lemon
  • Start date
  • #1
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1. The distance between the Sun and Earth is 1.5x10^11m and the Earth's orbital speed is 30km/s. Use this information and the value of G to estimate the mass of the Sun

could somebody check this for me please. thank you

2. G=6.67x10^-11Nm^2kg^-2

attachment.php?attachmentid=24426&d=1268784310.gif
 

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Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
Your working is correct, you numerical result is wrong. Your final answer should be in the order of 1030
 
  • #3
200
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it is too.
It should be 2.0x10^30(1s.f.)?
 
  • #4
D H
Staff Emeritus
Science Advisor
Insights Author
15,393
683
That is the answer you should get. Now look at your expression, and see if you really did calculate what you wrote down. (Hint: you didn't.)
 
  • #5
200
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I blame the calculator. Who's with me?

thanks everyone for this.:smile:
 

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