Calculate the temperature the entire sky would have to be in order to transfer energy by radiation at 1 000 W / m 2 —about the rate at which the Sun radiates when it is directly overhead on a clear day. This value is the effective temperature of the sky, a kind of average that takes account of the fact that the Sun occupies only a small part of the sky but is much hotter than the rest. Assume that the body receiving the energy has a temperature of 27 .0 ° C .
Calculate the temperature the entire sky would have to be in order to transfer energy by radiation at 1 000 W / m 2 —about the rate at which the Sun radiates when it is directly overhead on a clear day. This value is the effective temperature of the sky, a kind of average that takes account of the fact that the Sun occupies only a small part of the sky but is much hotter than the rest. Assume that the body receiving the energy has a temperature of 27 .0 ° C .
Calculate the temperature the entire sky would have to be in order to transfer energy by radiation at
1
000
W
/
m
2
—about the rate at which the Sun radiates when it is directly overhead on a clear day. This value is the effective temperature of the sky, a kind of average that takes account of the fact that the Sun occupies only a small part of the sky but is much hotter than the rest. Assume that the body receiving the energy has a temperature of
27
.0
°
C
.
Study of body parts and their functions. In this combined field of study, anatomy refers to studying the body structure of organisms, whereas physiology refers to their function.
The amount of heat per second conducted from the blood capillaries beneath the skin to the surface is 260 J/s. The energy is
transferred a distance of 1.5 x 103 m through a body whose surface area is 1.4 m². Assuming that the thermal conductivity is that of
body fat, determine the temperature difference between the capillaries and the surface of the skin.
The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their
average thickness is 21.4 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of
9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 24.0°C if the outside temperature is
0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground.
34.68
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all
intermediate results to at least four-digit accuracy to minimize roundoff error. m3
137.00
5.00 m
00
8.00 m
10.0 m
Calculate the temperature the entire sky would have to be in order to transfer energy by radiation at 1000 W/m2 —about the rate at which the Sun radiates when it is directly overhead on a clear day. This value is the effectivetemperature of the sky, a kind of average that takes account of the fact that the Sun occupies only a small part of the sky but is much hotter than the rest. Assume that the body receiving the energy has a temperature of 27.0ºC .
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