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

question 8

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, and ΔP is measured in N/m². Determine the wavelength (in m) of the wave.

• A) 1 500
• B) 0.32
• C) 477
• D) 1.01
• E) 0.50

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