Estimate Mass of Sun Using G, Distance and Speed

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To estimate the mass of the Sun, the distance from the Earth to the Sun (1.5x10^11 m) and the Earth's orbital speed (30 km/s) are used alongside the gravitational constant (G = 6.67x10^-11 Nm^2/kg^-2). A participant confirms that while the working calculations are correct, the numerical result is incorrect and should be approximately 2.0x10^30 kg. The error is attributed to a possible miscalculation or calculator issue. Participants encourage double-checking the calculations to ensure accuracy. The discussion emphasizes the importance of verifying numerical results in scientific calculations.
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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

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Your working is correct, you numerical result is wrong. Your final answer should be in the order of 1030
 
it is too.
It should be 2.0x10^30(1s.f.)?
 
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.)
 
I blame the calculator. Who's with me?

thanks everyone for this.:smile:
 

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