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Q. For a particular liquid-air interface the critical angle (for total internal reflection) is 52.6 degrees. The index of refraction of air is 1.00029. What is the index of refraction of the liquid?

Q. What will be the equilibrium temperature when a 271 g block of copper at 280°C is placed in a 169 g aluminum calorimeter cup containing 817 g of water at 11.5°C?

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