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A house is air conditioned using solar energy. Solar radiation heats a pressurized tank such that the temperature is maintained at 175 o C. 1500 kJ must be extracted from the hous
A motor has an output of 4.8kW, an efficiency of 80% and a power factor of 0.625 lagging when operated from a 240V, 50Hz supply. It is needed to improve the power factor to 0.9
Q. Give any two differences among Peltier effect and Joule's law of heating. Joule's law of heating Peltier effect Takes place all th
Does sunlight reflected off a mirror enhance the temperature of the sun-rays? A standard planar mirror will not enhance the energy contained in the rays that reflect off it. In
In the figure below the closed curves A and B represent closed surfaces. What is the total flux by the closed surface A? Ans: In concurrence with Gauss's Law the net o
Displacement related with a wave is given by y (x, t) = 0.1 cos(0.2x-2t). Where x y are in cm and ‘t' in second. Determine the wavelength, amplitude, frequency and velocity.
A iron rod on the surface of the beach and other iron rod into the sea water which metal corrodes easily? Ans) An iron rod on the surface of teh seawater because in sea it contains
The density of neutrons is of the order: (1)10 3 kg/ cc (2)10 6 kg/cc (3)10 9 kg/cc (4) 10 11 kg/cc Ans:(4) 10 11 kg/cc
what is boyle''s third law?
Q. If an object isn't moving, no external force acts on it. No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example:
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