Raising the water temperature
Consider a tank containing 40.0 kg of water. Neglecting the heat capacity of the tank, how much heat (in joules) would be required to raise the water temperature of from 1 to 94 degrees Celsius?
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The baseball player A hits the baseball with v_A = 40 ft/s and theta_A = 52^\circ. When the ball is directly above of player B he begins to run under it.
A short bar magnet placed with its axis at 30º with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 × 10-2 J. What is the magnitude of magnetic moment of the magnet?
What is the atmospheric pressure at that altitude? If the actual temperature outside her aircraft is18C, what is her density altitude?
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The tank eventually reaches room temperature of 25 degree C. If the air inside is allowed to escape without any heat transfer to the environment unit reaches a pressure of 200 KPa, find the remaining mass of air in the tank and its temperature.
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