Which medium (1 or 2) is more dense?

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

In a system, when potential energy decreases, then entropy also decreases. true false