Define specific heat at constant volume.
What will be an ideal response?
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Determine the black body radiation emitted in the bandwidth ?1 = 0.2 ?m to ?2 = 5.0 ?m from a surface at a temperature of, (a) 100ºC, (b) 1000ºC, and (c) 3000ºC.
What will be an ideal response?
The glass cover for a flat plate solar collector has a spectral transmissivity that may be approximated as shown in the figure. Determine the total effective transmissivity of the glass cover to solar radiation assuming the sun emits that of a blackbody at 5800 K.
GIVEN
• Glass cover for flat plate solar collector with transmissivity as shown.
• Solar radiation at 5800 K assuming it as blackbody.
FIND
• Total effective transmissivity of glass cover to solar radiation.
SKETCH
The density of a column of air decreases as altitude increases because
A. Air contracts as pressure decreases B. Air expands as pressure decreases C. Nonsense, the density of air is constant. D. Nonsense, the density of air increases as altitude increases.
Magnification is positive for inverted images
Indicate whether the statement is true or false