Ariver flows at a speed of 4.60m/s. a boat, capable of moving with a speed of 5.80m/s in still water is rowed across the river at an angle of 53.0° to the river flows. calculate the resultant velocity with which the boat moves and the angle that it's resultant motion makes to the river flow

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.