A) \[7.3\times {{10}^{-7}}J/kg\]
B) \[7.3\times {{10}^{-9}}J/kg\]
C) \[-7.3\times {{10}^{-9}}J/kg\]
D) \[7.3\times {{10}^{-6}}J/kg\]
Correct Answer: C
Solution :
[c] \[{{V}_{g}}=\frac{-6.67\times {{10}^{-11}}\times 10}{1}-\frac{6.67\times {{10}^{-11}}\times 100}{1}\] \[=-6.67\times {{10}^{-10}}-6.67\times {{10}^{-9}}\] \[=-6.67\times {{10}^{-10}}\times 11=7.3\times {{10}^{-9}}\,J/kg\]You need to login to perform this action.
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