### What is final pressure of the gas-what is the wave period

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A quantity of gas in a piston cylinder has a volume of 0.544 m3 and a pressure of 200 Pa. The piston compresses the gas to 0.126 m3 in an isothermal (constant-temperature) process. What is the final pressure of the gas? Pa A periodic wave has a frequency of 8.9 Hz. What is the wave period? ?

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