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

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