The variation in the pressure of helium gas, measured from itsequilibrium value,

Question

The variation in the pressure of helium gas, measured from itsequilibrium value, is given by
P = 1.5 x 10-5 cos(7.6x - 1200t) where x and thave units m and s, and P is measured in N/m2.Determine the wavelength (in m) of the wave. A.) 0.41 B.) 382 C.) 600 D.) 0.83 E.) 0.93 The variation in the pressure of helium gas, measured from itsequilibrium value, is given by
P = 1.5 x 10-5 cos(7.6x - 1200t) where x and thave units m and s, and P is measured in N/m2.Determine the wavelength (in m) of the wave. A.) 0.41 B.) 382 C.) 600 D.) 0.83 E.) 0.93

Explanation / Answer

The wavenumber k         k = 2 / From the given equation, wavenumbers is givenas          k = 7.6 So       2 / = 7.6          =2 / 7.6            = 0.8267m             = 0.83m

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