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A typical scuba tank has a volume V of 10 liters. When fully charged, it contains compressed air at a pressure of 200 bars, or 2.0 x 10^7 Pa.
a) What is the uncompressed volume of the air if the ambient pressure is 1000hPa and the temperature is 293K for both the compressed and uncompressed air?
b) How much mechanical work in joules is required to fill the tank, if the process is isothermal? Hint: Recall that the pressure p will be a function of V, and consider the starting and ending volumes as your limits of integration.
c) If the compressor is able to deliver 1000W of average power, how long does it take to fill the tank?
Two point charges are fixed on the y axis: a negative point charge q1 = -28 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.31 m. A third point charge q = +8.7 µC is fixed at the origin. The net electrostatic force exerted on the char..
The observed frequency of a train whistle is 475Hz as it approaches a stationary observer and is 410Hz as it recedes
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