An Olympic downhill skier (mass = 80 kg) races down a 30ø slope. If he starts from rest and the track is 50 m long, what is his final velocity at the bottom of the hill ?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.