You are pushing a refrigerator horizontally on a smooth floor exerting a 20 N force on it. earth pulls on the refrigerator exerting a 300 N force on it. what is the force that the floor exerts on the refrigerator? PLS ANSWER ASAP

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?