A pressure gage is used to measure the pressure of air inside a piston–cylinder device. The diameter of the cylinder is 8 cm. While the piston is at rest, the gage measures the pressure to be 40 kPa. A barometer measures the atmospheric pressure to be 100 kPa. A weight with a mass of 20 kg is placed on the top of the piston, and the piston moves until it reaches a new equilibrium point. What is the new gage pressure and the new absolute pressure of the air in the cylinder when this new equilibrium is reached?
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