If a lady walks into a room wearing perfume, eventually everyone in the room will be able to smell the perfume even if they are not standing right next to her. which of the following principles does this observation best support? a. atoms may join together to form molecules b. atoms may join together to form geometric patterns c. atoms and molecules are always in motion d. atoms and molecules are stationary

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.