1.

A geo-stationary satellite orbits around the earth in a circular orbit radius 36,000 km. Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface \[\text{(}{{\text{R}}_{earth}}=\text{6},\text{4}00\,\,\text{km)}\] will approximately be

A.  1/2 hr  
B.  1 hr  
C. Generator   
D.  4 hrs
Answer» D.  4 hrs


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