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Q. A .0225 kg sample of tin initially at 97.5 C is dropped into .115 kg of water. The initial temperature of water is 10.0 C. If the specific heat capacity of tin is 230 J/kg x C , what is the final equilibrium temperature of the tin- water mixture?

Q. A plate glass window (n = 1.5) has a thickness of 3.00 10-3 m. How long does it take light to pass perpendicularly through the plate?

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