Aheat pump has a coefficient of performance of 3.0 and is rated to do work at 1500 w. a. how much heat can it add to a room per second? b. if the heat pump acted as an air conditioner in the summer, what would you expectits coefficient of performance to be assuming all else stay the same? what is the rise in temperature of the air in the room in part (a) if the heat pump is run for 5 minutes? assume (unrealistically) no loss of heat from the room (of dimensions 10m x8m x 3m), and for ease of calculation assume air composed of only nitrogen (molar mass 2be, density at ambient temps 1.25 kg/m3)

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?