For what height a black of ice be dropped in order that it may completely melt. it is assumed that 20% of energy's of fall is retained by ice.[L=80 cal/gm]

The plum pudding model of the atom states that ?

What happens to an isotope during radioactive decay?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)