A 0.228 kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.228 kg puck moving initially along the x axis with a speed of 2.27 m/s. After the collision, the 0.228 kg puck has a speed of 1.27 m/s at an angle of 31◦ to the positive x axis. Determine the magnitude of the velocity of the 0.228 kg puck after the collision. Answer in units of m/s.

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)

What part of the ear is names after tools, such as the hammer and the anvil?

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.