When a monochromatic light falls on a metallic surface, a number of electrons is
liberated if another monochromatic light of high energy falls with the same intensity
on the same metal, the number of liberated electrons
(Increases - decreases - doesn't change - no correct answer)

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.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

By examining a wave’s pattern after it interacts with a barrier or gap, measurements can be made to better understand certain wave phenomena. what is a broad question you can answer by doing this experiment?