An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0400g.
what is the maximum force the motor should exert on the supporting cable?
what is the minimum force the motor should exert on the supporting cable?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

State the following: boyle's law and charle's law

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.