______ atoms do not easily react with or form bonds with other atoms.
1 answer:
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Answer:
U = 11.67 W/m² °C
Explanation:
Inner diameter, d = 2.5 cm = 0.025 m
Thickness of the wall, t = 2 mm = 0.002 m
thus, the outer diameter, D = d + 2t = 0.025 + 2 x 0.002 = 0.029 m
Now, based on outside convection heat transfer
we have
on rearranging, we get
where, are the perimeter respective to inner and and outer diameter
on substituting the values, we get
or
U = 11.67 W/m² °C
Answer:
2.30714 W
-16.38071 W
Explanation:
k = Heat conduction coefficient = 0.8 W/(m·°C)
A = Area = 2907 cm²
l = Thickness = 5.6 mm
= Outside temperature
= Inside temperature
Rate of heat transfer is given by
The rate of energy transfer is 2.30714 W
The rate of energy transfer is -16.38071 W