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The external wall of a room in a house has a cross-sectional area of 34.13 m2. The convective heat transfer coefficients for the inside air are 8.77 Wm-2 0C-1. It is desired for the room to have a temperature of 23.740C and the external temperature to be 0 0C. The heater in the room is capable of supplying heat at a steady rate of 934 W.
Find the temperature for the internal surface of the wall, in 0C, giving your answer to 3 decimal places.
A cannonball is shot (from ground level) with an initial horizontal velocity of 37.0 m/s, What is the speed of the cannonball 3.5 seconds after it was shot
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What is the value of the static friction.
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