a car brakes from 100 m/s to 5 m/s in 100 meters. Is this an example describing velocity, speed, or acceleration?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

What are the necessary conditions for fusion?

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.