Physics, 01.10.2019 04:30 singfreshjazz3370
Consider a 1.5-m-high and 2.4-m-wide glass window. whose thickness is 6 mm and thermal conductivity is k = 0.78 w/m·k. determine the steady rate of heat transfer through this glass window and the temperature of its inner surface for a day during which the room is maintained at 24°c while the temperature of the outdoors is −5°c. take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1, = 10 w/m2·k and h2 = 25 w/m2·k, and disregard any heat transfer by radiation.
Answers: 1
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The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared
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Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.
Answers: 3
Consider a 1.5-m-high and 2.4-m-wide glass window. whose thickness is 6 mm and thermal conductivity...
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