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Calculate the top heat-loss coefficient for a solar collector with a single glass cover having the following specifications (neglect edge effects), also calculate the ambient air temperature:
Overall heat-loss coefficient 3.46 W/(m2.K)
Convection heat-transfer coefficient (hc,p-c) 2.65 W/(m2.K)
Spacing between the plate and the cover 2.5 cm
Plate emissivity 0.2
Glass emissivity 0.88
Back insulation thickness 5 cm
Conductivity of back insulation material 0.045 W/(m.K)
Mean plate temperature 373 K
Temperature of cover 298 K
Collector tilt 45o
Wind heat transfer coefficient 10 W/(m2.K)
a body is thrown horizontally with a velocity of u from the top of a tower. the displacement of the stone when the horizontal and vertical velocities are equal is
what are the combination of clippers ?explain with diagram
What is incorrect with this picture? Answer: The Current is the flow rate of charge. When the charge obtains to the junction of three wires (including the wire the
to calculate average speed, divide distance by time?
Maximum Range Suppose a cannonball launched from a cannon at 3 various launch angles - 30-degrees, 45-degrees, and 60-degrees. The launch speed is held constant; just the angle
A carbon steel plate (thermal conductivity = 45 W/m o C) (600 x 900 x 25) mm 2 is maintained at 310 o C. Air at 15 o C bellows over the hot plate. If convection heat transfer co-e
Alternating Current: (AC) Such a current can be obtained if a resistor is linked in series with a source of alternating voltage. This current alters its direction so many times
12 to 16 pages project or assignment on electrostatic shielding
It is an instrument which can detect/calculate very small electric currents. It is also called as moving magnet galvanometer. It has of three circular coils of insulated copper wir
different questions and their answers about elasticity
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