Find the heat-loss rate through a slab of wood 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C.
Find the heat-loss rate through a slab of wood 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C.
Find the heat-loss rate through a slab of Styrofoam 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C.
Homework Answers
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Find the heat-loss rate through a slab of wood 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C.
A cork slab 10 cm thick has one face at -12 degrees C and the other...
A cork slab 10 cm thick has one face at -12 degrees C and the other face at 21 degrees C. If the mean thermal conductivity of the cork in this temperature range is 0.042 J/s m degree C, what is the rate of heat transfer through 1 m^2 of wall?
One side of a copper block 4 cm thick is maintained at 175oC. The other side...
One side of a copper block 4 cm thick is maintained at 175oC. The other side is covered with a layer of fiberglass 1.5 cm thick. The outside of the fiberglass is maintained at 80°C, and the total heat flow through the composite slab is 300 W. What is the area of the slab?
A carpenter builds an exterior house wall with a layer of wood 2.9 cm thick on...
A carpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of Styrofoam insulation 2.1 cm thick on the inside wall surface. The wood has k=0.080W/(m⋅K), and the Styrofoam has k= 0.010 W/(m⋅K). The interior surface temperature is 19.0 ∘C , and the exterior surface temperature is -10.0 ∘C . What is the temperature at the plane where the wood meets the Styrofoam?
Consider the rate of heat conduction through a double-paned window that has a 1.45-m2 area and...
Consider
the rate of heat conduction through a double-paned window that has
a 1.45-m2 area and is made of two panes of
0.715-cm-thick glass separated by a 1.25-cm air gap. You can ignore
the increased heat transfer in the air gap due to convection.
Calculate the rate of heat conduction through this window, in
watts, given that the inside surface temperature is 15.0°C, while
the outside temperature is -10.0°C. Make the assumption that the
temperature differences across the two glass...
Question 3 A 11 m x15m house is built on a 14 cm -thick concrete slab....
Question 3 A 11 m x15m house is built on a 14 cm -thick concrete slab. Part A What is the heat-loss rate through the slab if the ground temperature is 5 ° while the interior of the house is 24 Express your answer using two significant figures. ? kW At Submit Request Answer
Calculate the rate of heat conduction through house walls that are 14.7 cm thick and that...
Calculate the rate of heat conduction through house walls that are 14.7 cm thick and that have an average thermal conductivity of 0.057 J/(s•m•ºC). Assume there are no windows or doors. The surface area of the walls is 136 m2 and their inside surface is at 19.9ºC , while their outside surface is at 4.9ºC .
(a) Calculate the rate of heat conduction through house walls that are 13.0 cm thick and...
(a) Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 120m2 and their inside surface is at 18.0ºC, while their outside surface is at 5.00ºC (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction?
(a) Calculate the rate of heat conduction through house walls that are 15.5 cm thick and...
(a) Calculate the rate of heat conduction through house walls that are 15.5 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 125 m2 and their inside surface is at 21.0°C, while their outside surface is at 5.00°C. W (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction? (Round your answer to the...
(a) What is the rate of heat conduction (in W) through the 2.00 cm thick fur...
(a) What is the rate of heat conduction (in W) through the 2.00 cm thick fur of a large animal having a 1.30 m2 surface area? Assume that the animal's skin temperature is 30.0°C, that the air temperature is −6.50°C, and that fur has the same thermal conductivity as air. (Assume the thermal conductivity of air is 0.023 J/(s · m · °C).) W (b) What food intake (in kcal) will the animal need in one day to replace this...
One side of a copper block 4 cm thick is maintained at 175oC. The other side is covered with a layer of fiberglass 1.5 cm thick. The outside of the fiberglass is maintained at 80°C, and the total heat flow through the composite slab is 300 W. What is the area of the slab?
Consider
the rate of heat conduction through a double-paned window that has
a 1.45-m2 area and is made of two panes of
0.715-cm-thick glass separated by a 1.25-cm air gap. You can ignore
the increased heat transfer in the air gap due to convection.
Calculate the rate of heat conduction through this window, in
watts, given that the inside surface temperature is 15.0°C, while
the outside temperature is -10.0°C. Make the assumption that the
temperature differences across the two glass...
Question 3 A 11 m x15m house is built on a 14 cm -thick concrete slab. Part A What is the heat-loss rate through the slab if the ground temperature is 5 ° while the interior of the house is 24 Express your answer using two significant figures. ? kW At Submit Request Answer
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