What is the frequency of a sound wave as perceived by the human ear?

What kind of waves are sound waves?  

52. In his interview with Dalton Conley, Doug McAdam explains that the Internet makes it easy for new social movements to disseminate information broadly. However, he also notes some drawbacks, including the fact that

What is the purpose of a heat pump?

How will your perceived frequency change if you move away from a stationary source of sound?

A helicopter is flying east at m/s at a constant altitude of m above a level field. If a wheel falls off of the helicopter,what will be the magnitude of its velocity vector in m/s just before it hits the ground?

A mass on a spring is oscillating with a period of 2 seconds. If the amplitude of the oscillation is doubled, what will be the new period?

35. In the past, being overweight or obese may have been seen as a personal failing, but now it is seen as a disease to be treated by doctors. This is an example of the process known as

What is the unit of sound intensity level?

In mm, how far off is the laser in question?