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Fractional uncertainty of g on the surface of the Sun

1. Homework Statement

upload_2018-8-13_20-50-56.png

2. Homework Equations
upload_2018-8-13_20-50-36.png


3. The Attempt at a Solution
39154928_2130599527158088_4581274140983427072_n.jpg

it looks like I got too big numbers for the uncertainty
 

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Charles Link

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Looks like you got the calculus part correct. The numbers you entered after that are too small and not written neatly enough to be able to see them.
 

haruspex

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You seem to have crossed over terms, e.g. you have ##\frac{\partial Z}{\partial A}\alpha_B## instead of ##\frac{\partial Z}{\partial A}\alpha_A##.
 
You seem to have crossed over terms, e.g. you have ##\frac{\partial Z}{\partial A}\alpha_B## instead of ##\frac{\partial Z}{\partial A}\alpha_A##.
Oh, thank you so much I got 38.98 now for part b). I hope that this is correct.
 

haruspex

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Oh, thank you so much I got 38.98 now for part b). I hope that this is correct.
Looks ok. Notice that the fractional uncertainty in d (1 in 14) is far higher than that in M. This means you can ignore the uncertainty in M and write down immediately that the uncertainty in g is 1 in 7 (doubled because of d2).
 
Looks ok. Notice that the fractional uncertainty in d (1 in 14) is far higher than that in M. This means you can ignore the uncertainty in M and write down immediately that the uncertainty in g is 1 in 7 (doubled because of d2).
Thanks
 

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