What would be the final temperature of 100g of 16degc water, Ask an Expert

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Q. What would be the final temperature of 100 g of 16°C water when 107 g of 40°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/g °C. Here you should equate the heat gained by the water to the heat lost by the nails.)

Q. Why does the existence of a cutoff frequency, below which no photoelectrons are ejected from a metallic surface, support the photon theory rather than the wave theory of light?

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