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

question 14

Multiple Choice

The variation in the pressure of helium gas, measured from its equilibrium value, is given by $\Delta$ P = 2.9 * 10-5 cos (6.20x - 3 000t) where x and t have units m and s, and $\Delta$ P is measured in N/m². Determine the frequency (in Hz) of the wave.

• A)1500
• B)477
• C)1.01
• D)0.32
• E)239

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