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  • The order of mass of earth (in Kg) is given as  then n is close toOption

The order of mass of earth (in Kg) is given as 10^n then n is close to

Option: 1

25


Option: 2

30


Option: 3

32


Option: 4

33


Answers (1)

best_answer

As we learnt

 

Mass of earth -

 

M=\frac{gR^{2}}{G} \simeq \; 10^{25}kg

M\rightarrow mass of earth

G\rightarrow Gravitational constant

 

- wherein

Use     g=\frac{GM}{R^{2}}

 

 As g=\frac{GM}{R^2}\Rightarrow M=\frac{gR^2}{G}

M=\frac{9.8*(6.4*10^6)^2}{6.67 \times 10^{-11}}= 5.98*10^{24}kg\approx 10^{25}kg

 

Posted by

manish painkra

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