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পৃথিবীতে কোনো বস্তুর মুক্তিবেগ-

i. 

ii. Vc=83πpGR2

iii. Vc= 2GMR

নিচের কোনটি সঠিক?

Created: 10 months ago | Updated: 10 months ago
Updated: 10 months ago
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