Physics · Gravitation
6 × 1024 kg के एक द्रव्यमान को एक ठोस गोले के रूप में इस प्रकार संकुचित किया जाना है कि उसकी सतह से पलायन वेग 3 × 104 m/s हो जाए। गोले की त्रिज्या कितनी होगी? (सार्वत्रिक गुरुत्वाकर्षण नियतांक G = 6.66 × 10-11 N·m2/kg2 लीजिए):
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