When gases in a system are compressed, the energy of the system and the temperature of the system
When gases in a system expand, the energy of the system
and the
temperature of the system

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?