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Homework Helper

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Dark_Dragon said:ok, so if my equation to find the mass of the sun is:

T²/R³ = 4п²/GM

and i used the orbital period (T²)(in seconds) and the distance from the sun (R³)(in metres) of say, venus, then i transform the equation to find "M" and i get:

M = 4π²(R³/T²) / G

M = (4π²)(1.08e+11/1.95e+7) / (6.67e-11)

=3.27e+15

but the mass of the sun is 1.98e+30.

Check your calculations. I get 1.92*10^30 kg.

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Check your orbital period. Make sure you convert the year into seconds and then square it.

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ok scratch the last post, i got it, thank you for your help both of you!

much appreciated =)

much appreciated =)

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