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Q. A liquid of refractive index 'n' is filled in a beaker of height 'h'. Find the amount by which a coin at its bottom seems to be raised?

Q. A uniform solid cylinder (m=0.590 kg, of small radius) is at the top of the similar ramp, which has friction. The cylinder starts from rest and rolls down ramp without sliding and goes around the loop. Find out the speed of the cylinder at the top of the loop.

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