A 1210 kg rollercoaster car is moving 8.37 m/s. Before entering
the station, it first rolls up a 2.26 m
hill. How fast is it moving then?
(Unit = m/s)

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.