A mass of 6 × 10
A mass of 6 × 1024 kg is to be compressed in a sphere in such a way that the escape velocity from the sphere is 3 × 108 m/s . Radius of the sphere should be (G = 6.67×10-11 N-m2/kg2)
(a) 9 km (b) 9 m
(c) 9 cm (d) 9 mm
Answer: d
(1088)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)