If gravity is exerting a force of 980 Newton's on an object in air, and the acceleration due to gravity is 9.8 m/s2, what is the object's mass?​

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.