What force is applied to a 9.2-in piston in a cylinder, if the pressure in the cylinder is 23 psi? What is the sound pressure level corresponding to 67 dB? 8 What is the change in light intensity when...

What force is applied to a 9.2-in piston in a cylinder, if the pressure in the cylinder is 23 psi? What is the sound pressure level corresponding to 67 dB?

8 What is the change in light intensity when the distance from the light source is increased from 35 to 85 ft? What is the wavelength of 13 kHz sound waves?