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

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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