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Q. A light ray enter from air into a liquid at an angle of 53 degrees it is refracted making an angle of 37 degrees with the normal.find the refractive index of liquid.

Q. A solid cylinder with a radius of 4.0 {rm cm} has the same mass as a solid sphere of radius R. If the cylinder and sphere have the same moment of inertia about their centers, what is the sphere's radius?

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