Acounter-flow double-pipe heat exchanger serves as an oil cooler with oil flowing in one direction through the inner tube and cooling water in the opposite direction through the annulus. the oil flow rate is 0.63 kg/s, the oil has a specific heat of 1.68 kj/(kg. k), the water flow rate is 0.5 kg/s and its specific heat is 4.19 kj/(kg. k). in a test of a prototype, oil entering at 78 oc was cooled to 54oc when the entering water temperature was 30oc. the possibility of increasing the area of the heat exchanger by increasing the length of the double pipe is to be considered. if the flow rates, fluid properties, and entering temperatures remain unchanged, what will the expected outlet temperature of the oil be if the area is increased by 20%?

he . if i may ask what i your question exactly?

explanation:

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

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

the right answer is 0.3 meters per second