```   (b) in the air of 100°C
(c) in the water
(d) in the wood
Ans: (d)
249. If a tunnel is made along the diameter of the earth and a piece of stone is
gently released then:
(a) it will execute SHM
(b) it will execute periodic motion
(c) there is no specific motion
(d) None of these
Ans: (a)
250. The time period of the revolution of the geostationary satellite around the
earth is :
(a) equal to that of the earth
(b) twice that of the earth
(c) equal to that of the moon
(d) None of the above
Ans: (a)
251. The escape velocity of anybody on the earth"s surface is equal to how
many times the orbital velocity of the same body on the earth"s surface:
(a) 2 times
(b) 2 times
(c) 3 times
(d) No any relations exists
Ans: (b)
252. If a body is revolving around the earth"s orbit with its usual velocity, then
what would be the minimum energy required to let it escape from the orbit:
(a) double of its orbiting energy
(b) 2 of its orbiting energy
(b) triple of its orbiting energy
(c) None of these
Ans: (a)
194
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