The Variation in the Pressure of Helium Gas,measured from Its $\Delta$

question 35

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)1 500
• B)477
• C)1.01
• D)0.32
• E)239

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