Which term describes the transfer of thermal energy from one object to another because of a difference in temperature? 1.energy 2.friction 3.heat 4.work

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

What are the north and south poles of a solenoid change with?

What happens when the vapor pressure of a liquid is equal to the external pressure?