Two dogs are having a tug of war by pulling on a rope. The dogs have pulled themselves to a standstill. Each dog is pulling on the rope with a force of 15 pounds. What is the tension in the rope? Hint: 5 Newtons = 1 pound.

A. 75 Newtons toward the left dog
B. 150 Newtons
C. 30 pounds toward the rope
D. 15 pounds

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?

Does heating a metal wire increase or decrease its electrical resistance? why?

At the negative terminal of the battery the electron has electric potential energy. what happens to this energy as the electron jumps from the negative to the positive terminal?