Water at 80 °c is pumped through 100 m of stainless steel pipe, k = 16 w/m k of inner and outer radii 47 mm and 50 mm respectively. the heat transfer coefficient due to water is 2000 w/m² k. the outer surface of the pipe at 20 °c loses heat by convection with a heat transfer coefficient is 200 w/m². k. a- calculate the heat flow through the pipe. b- now, suppose that we want to reduce the rate of heat loss from the pipe to the air to only 5.39 kw by adding a layer of insulation with k= 0.1 w/m k, calculate the required thickness of the insulation.

i wish i could but this one is weird give me abc and i can solve it.

it's c (engineer's do their work with mechanical stuff not on any living being)

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.