When 50.0 liters of oxygen at 20.0°C is compressed to 5.00 liters, what must the new temperature be to maintain constant pressure?

The answer would be d. hope this :

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion

Answerthe number of protons in an atom is its atomic number

The correct answer is:   [b]:   "convection" .