Oil at 150°c flows slowly through a long, thin-walled pipe of 25-mm inner diameter. the pipe is suspended in a room for which the air temperature is 20°c and the convection coefficient at the outer tube surface is 11 w/m2·k. estimate the heat loss per unit length of tube, in w/m.

Q=112.31 W/m

Explanation:

Given that

Oil temperature T₁= 150°C

Air  temperature T₂= 20°C

Heat transfer coefficient h= 11 W/m²K

Diameter ,d= 25 mm

The heat loss given as

Q= h A ΔT

A= πdL

Q= h ( πdL)ΔT

Heat loss per unit length

Q= h ( πd)ΔT

Now by putting the values

Q=112.31 W/m

Therefore heat loos will be 112.31 W/m

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!