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# Pressure Waves

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A hollow log, open at one end, is struck with a stout stick. The hollow cavity of the log is 6 meters long, and the pressure waves that constitute sound travel at 342m/s. What are the frequencies of the resulting first four harmonics?

https://brainmass.com/physics/sound-hearing/pressure-waves-45486

#### Solution Preview

Since the log is open at one end and close at the other, the first four modes in this log ...

#### Solution Summary

The solution contains the equations and calculations necessary to solve the problem.

\$2.19

## Wave Dynamics and Water Vapor Pressure

See the attached file.

Equations describing wave dynamics and dispersion are used to deduce the following

1.
A wave of period 10s approaching the shore has a height of 1m in deep
water. Calculate (use ?=1.03×103 kg m-3)
(a) The wave speed and group speed in deep water =
(b) The wave steepness in deep water =
(c) The wave power per metre length of crest in deep water =
(d) The wave power per metre length of crest in water 2.5 m deep =

The super cooling of water into droplets is described for the scenario below

2.
Ice particles and super cooled water droplets exist in the same cloud at a temperature if T = 260 K. The water vapor pressure in the cloud is P h2o = 2.50mb. I have to develop an argument that shows the liquid droplets will tend to evaporate and the ice particles will tend to grow.

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