Two identical metal spheres a and b are in contact. both are initially neutral. 1.0× 10 12 electrons are added to sphere a, then the two spheres are separated. part a afterward, what is the charge of sphere a? express your answer with the appropriate units. q a q a = nothing nothing submitrequest answer part b afterward, what is the charge of sphere b? express your answer with the appropriate units. q b q b = nothing nothing submitrequest answer provide feedback next

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)

The energy released by a nuclear fusion reaction is produced when