Describe, using diagrams, the potential energy and allowed energy levels of an electron in an infinite potential square well, a harmonic oscillator, and a hydrogen atom.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

How many atoms of nitrogen are in the chemical formula ni(w on

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.