If a reversible heat engine operating between thermal reservoirs at 800°C and 30°C drives a reversible refrigerator which operates between -15°C and 30°C. The heat supplied to engine is 1900 kJ and there is a net work output of 290 kJ. die Determine (i) The cooling effect Cod (ii) Total heat transfer to 30°C thermal reservoir.
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Two charges q are placed at distance d apart a charge -q is placed at mid point and thrown with kinetic enery 64joule and after some time it velocity became zero then displacement 9f charge -q
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A coil has 2.25Ω resistance and 440 mH inductance. If the current is 3.00 A and is increasing at a rate of 3.50 As-1 , what is the potential difference across the coil at this moment?
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A uniform 3.00-kg rope 24.0 m long lies on the ground at the top of a vertical cliff. A mountain climber at the top lets down half of it to help his partner climb up the cliff. What was the change in potential energy of the rope during this maneuver?
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