Find the wavelength in air at 20°c of a 32 hz sound.

For speed of sound at a given temperature we will use

here we know that

t = temperature in degree C

here we know that

now from above equation

now we know that wavelength and frequency is related to speed as

now we have

now from above formula

so wavelength is 10.8 m

Person weighing 0.9kN rides in an elevator that has downward acceleration ... What is the magnitude of the force of the elevator floor on the person. ... and 2) -9.8m/s^2 due to gravity and 3) the normal force of the elevator floor

Explanation: