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Calculate the overall heat-loss coefficient for a solar collector with a single glass cover having the following specifications (neglect edge effects):
Spacing between the plate and the cover 5 cm
Plate emittance 0.2
Glass emittance 0.88
Ambient air temperature 283 K
Back insulation thickness 3 cm
Conductivity of back insulation material 0.04 W/(m.K)
Mean plate temperature 340 K
Collector tilts 45°
Wind - heat transfer coefficient 10 W/(m2.K)
A radioactive substance has a half life of 1 min. If one nuclei decays now , when will be next decay????
1. What is the difference between finite elements, finite difference, and finite volume? 2. What is stability, consistency, and convergence of a difference equation? 3. What
what is the principle of tangent galvanometer?
group velocity and phase velocity
Loudness: It is the characteristics of sound by a faint sound can be distinguish by a loud sound is known as loudness.
Write down the electromagnetic wave equation in free space, in terms of vector and scalar potential.
how can i make project on human eye and its defects?
YES GRAVITY CAN BAND LIGHT e.g. GRAVITY OF BACK HOLE IS VERY STRONG
Will we always see a difference in brightness along an optic? Not essentially so. The human imagine system appreciates illuminance grades into a logarithmic fashion and when th
graph
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