A) 6 h
B) 12 h
C) 24 h
D) 3 h
Correct Answer: A
Solution :
For rotating earth its angular momentum\[{{I}_{\omega }}\]remains constant. If radius is halved then its moment of inertia\[(I)\]will become one fourth. for\[{{I}_{\omega }}\]to remain constant. Its angular velocity cd becomes four time. So, duration of day\[=\frac{24}{4}=6h\]
You need to login to perform this action.
You will be redirected in
3 sec
