A glass bottle full of mercury has a mass of 500 g on being heated through 35°c, 2.43 g of mercury expelled. calculate the mass of the mercury remaining in the bottle (cubic expansivity of mercury= 1.8 × 10^-4 k^-1 )( linear expansivity of glass = 8×10^-6 k^-1)​

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.