a skier leaves the lodge traveling at a constant speed of 12m/s. 30 minutes later, another skier leaves the same lodge traveling the same trail. At what speed must the second skier travel to catch up with the first skier in 90 min

Arock collection comes from which part of earth?

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

Does heating a metal wire increase or decrease its electrical resistance? why?