X4.46 As shown in Fig. P4.46, a pump operating at steady state draws water from a pond and delivers it though a pipe whose exit is 90 ft above the inlet. At the exit, the mass flow rate is 10 lb/s. There is no significant change in water temperature, pressure, or kinetic energy from inlet to exit. If the power required by the pump is 1.68 hp, deter- mine the rate of heat transfer between the pump and its surroundings, in hp and Btu/min. Let g = 32.0 f/s?.

question 4b

While constant total pressure = 4.5 atm, an ideal gas grows from 500ml to 900ml. After, the heat flows out of the gas at constant volume. Pressure and temperature may drop until the temperature reaches its original value. During this process, what's the total work done by this gas (answer in J(? please use convsersion: 1atm=1.013x105 Pa

A gas is compressed inside a cylinder. An average force of 67 N acts to move the piston 4.4 m. During the compression, 82 J of heat are conducted away from the gas. What is the change in internal energy of the gas?