A liquid food product is being cooled from 80C to 30C in an indirect heat exchanger using cold water as a cooling medium. If the product mass fl ow rate is 1800 kg/h, determine the water fl ow rate required to accomplish product cooling if the water is allowed to increase from 10C to 20C in the heat exchanger. The specifi c heat of the product is 3.8 kJ/(kg K) and the value for water is 4.1 kJ/(kg K).

we need answer choices

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min