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

question 10

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

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

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