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Q. High-speed stroboscopic photographs show that the head of a 270 g golf club is traveling at 55 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 46 m/s. Find the speed of the golf ball just after impact.

Q. A charged isolated metal sphere of diameter 11 cm has a potential of 9000 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.

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Category:- Physics
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