A tank with a constant volume of 2.07 m^3 contains 15.5 moles of a monatomic ideal gas. The gas is initially at a temperature of 300 K. An electric heater is used to transfer 58400 J of energy into the gas. It may help you to recall that CV = 12.47 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022 *10^23) times the number of moles of the gas. Required:
a. What is the temperature of the gas after the energy is added?
b. What is the change in pressure of the gas?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.