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I cant figure this problem out? Can someone please help. Thanks. A glass is half-full of water, with a layer of vegetable oil (n = 1.47) floating on top. A ray of light traveling downward through the oil is incident on the water at an angle of 65.2°. Determine the critical angle for the...

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 120-km race in which his average speed is 10.0 m/s...

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 50.0 kg, and the hill is inclined at 19.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant...