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The Variation in the Pressure of Helium Gas, Measured from Its

question 8

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The variation in the pressure of helium gas, measured from its equilibrium value, is given by ΔP = 2.9 × 10−5 cos (6.20x − 3 000t) where x and t have units m and s, and ΔP is measured in N/m2. Determine the wavelength (in m) of the wave.


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