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final essay questions
Physics Week 8 Final
1.1.One hundred joules of heat energy are transferred to 20 g of mercury.By how much does the temperature of the mercury increase? How much heat is needed to raise the temperature of 20 g of water by the same amount? Explain and show all work.
2.A 2000 cm3 container holds 0.10 mol of helium gas at 300 °C. How much work must be done to compress the gas to 1000 cm3at constant pressure? How much work to compress the gas to 100 cm3at constant temperature?Explain and show all work.
3.A very thin oil film (n = 1.25) floats on water (n = 1.33). What is the thinnest film that produces a strong reflection for green light with a wavelength of 500 nm?Explain and show all work.
4.An underwater diver sees the sun 50° above horizontal. How high is the sun above the horizon to a fisherman in a boat directly above the diver? Explain and show all work.