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HomePhysicsTwo identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to 

Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to 

(a)      R2                                      (b)    R–2

(c)   R4                                        (d)  R–4

Answer:  c

(18)

5/5 - (2 votes)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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