A satellite moves round the earth in a circular orbit of radius R making one revolution per day. A second satellite moving in a circular orbit, moves round the earth once in 8 days. The radius of the orbit of the second satellite is
(a) 8 R (b) 4R
(c) 2R (d) R
Answer: b
(7)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)