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Q. A portable 3.5kw wate heater is immersed for 3 minutes in a plastic filled with 20 kg of water at 20C. what will be the final temperature of the mixture given specific heat of water at 4186 j/gkC?

Q.A solid disk of radius 1.6m and mass 2.3 kg rolls without slipping to the bottom of an inclined plane. If the angular velocity of the disk is 5.35rad/s at the bottom, what is the height of the inclined plane?

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