# Fractional uncertainty of g on the surface of the Sun

#### Jozefina Gramatikova

1. Homework Statement

2. Homework Equations

3. The Attempt at a Solution

it looks like I got too big numbers for the uncertainty

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Homework Helper
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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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2018 Award
You seem to have crossed over terms, e.g. you have $\frac{\partial Z}{\partial A}\alpha_B$ instead of $\frac{\partial Z}{\partial A}\alpha_A$.

#### Jozefina Gramatikova

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

Homework Helper
Gold Member
2018 Award
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).

#### Jozefina Gramatikova

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

"Fractional uncertainty of g on the surface of the Sun"

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