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

question 45

Multiple Choice

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. Determine the speed (in m/s) of the wave.

• A) 1 515
• B) 153
• C) 484
• D) 828
• E) 101

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