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).

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

i believe the answer is a hope it and is correct

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.