19.10 A single-thickness glass window on a house actually has layers of stagnant air on its two surfaces. But if it did not, how much heat would flow out of an 80 cm x 40 cm x 3.0 mm window each hour on a day when the outside temperature was precisely 0°C and the inside temperature was 18 °C? For glass, kr is 0.84 W/K m. Ans. 1.4 x 10 kcal/h
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i cannot get the answer of 1.4 x 10^3 kcal/h pls help me
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- A picture window has dimensions of 1.34 m by 2.65 m and is made of glass 5.93 mm thick. On a winter day, the outside temperature is -20°C, while the inside temperature is a comfortable 19.5°C. At what rate is heat being lost through the window by conduction? kglass = 0.80 W/m.K Round your answer to 2 decimal places.An electronics device generates 30.5 W of heat energy during normal operation. The heat is dissipated from the top surface of the device to ambient air at 23°C. If the top surface area is 0.158 m2 and the convection heat transfer coefficient is 7.838 W/m2. K, what will be the surface temperature (in °C) of the device [round your final answer to one decimal place]? Air, T. T 00 SA rectangular window in a home has a length of 1.5 m and a height of 0.80 m. If the window allows heat to escape from the home at a rate of 2,000 watts, how thick must the window be if the inside temperature of the home is 220 C and the outside temperature is 3.00C? (Assume that the coefficient of thermal conduction of glass is 0.80 W/mK.) a. 7.1 mm b. 124 mm c. 9.1 mm d. 8.1 mm e. 11 mm
- In an experiment to determine the thermal conductivity of a bar of a new metal alloy, one end of the bar is maintained at 0.00°C and the other end at 100. °C. The rectangular bar is 2.25 cm x 2.25cm and a length of 0.500 m. If the rate of heat transfer through the bar is 15.0 J/s, what is the thermal conductivity of the bar to 3 sig fig? Material having thermal.conductivity Area A 51 snoA glass window is 3.7 mm thick, is 2.29 m tall by 1.04 m wide, and has a thermal conductivity of 1.0 W/m K. What is the rate of heat loss (in W) through the window if the inside temperature is 22.3° C and the outside temperature is -20.7 ° C ?A hot steel plate with a surface area of 1.52 m2 and a constant surface temperature of 166°C is exposed to ambient air at 22°C. If the convection heat transfer coefficient is 15.9 W/m². K, what is the rate of heat transfer (in W) from the plate to the air [round your final answer to zero decimal places]? T. S Air, T, 00
- A Thermopane window of area 5 m² is con- structed of two layers of glass, each 4.4 mm thick separated by an air space of 3 mm. If the inside is at 11°C and the outside is at -24°C, what is the heat loss through the window? The thermal conductivity of glass is 0.8 W/m .° C and of air is 0.0234 W/m .° C. Answer in units of kW.A solid concrete wall. (k = 0.0012) is 30 cm thick. If the inner. surface is :2O°C and the outer is o° C, find the temperature in the wall. as.a function of the distance from the outer surface and det ermine the heat los per.day through a square. meter.Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an average thermal conductivity is 0.084 J/s.m.oC. Assume there are no windows or doors. The surface area of the walls is 120 m2 and their inside surface is at 18.0°C , while their outside surface is at 5.00°C .
- A glass window is 1.9 mm thick, is 2.32 m tall by 1.08 m wide, and has a thermal conductivity of 1.0 W/m K. What is the rate of heat loss (in W) through the window if the inside temperature is 23.9 °C and the outside temperature is -26.2 °C?A glass window has an area of 1.6 square meter and a thickness of 4mm. If one side is at a temperature of 6.8 deg C and the other is at – 5 deg C, how much thermal energy flows through the window in a time of 24 hours? The thermal conductivity of glass is 1.89 x 10 -4 kCal/m-s-degC A.77075.712kCal B.88075.712kCal C.99075.712kCal D.66075.712kCalA 450 g metal cube which is originally at 110 degree(s) C oven is dropped into 0.003 m3 of water in a at 70 degrees Celcuis in an insulated cup. After both water and cube reached thermal equilibrium, the final temp is 78 degrees Celsius. What is the specific heat capacity of the uknown metal cube? cWater= 4200 j/kgK cCube=? A. 2800 j/kgk B. 7000 j/kgk C. 6500 j/kgk D. 5100 j/kgk E. None