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Question1

A 0.225kg sample of tin originally at 97.5 degrees c is dropped into 0.115kg of water firstly at 10.0 degrees c. If the exact heat capacity of tin is 230 J/kg times c, what is closing equilibrium temperature of the tin-water mixture?

Question2

An airtight box has a detachable lid of area 1.3 x 10-2 m2 and minor weight. The box is taken up a mountain where air pressure outside the box is 0.85 x 105 Pa. The inside of the box is completely evacuated. What is the magnitude of the force necessary to pull the lid off the box?

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Category:- Physics
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