The relation of the temperature and pressure of gas is proportional; if the temperature raises, the pressure will raise at the same rate.
The wave travels at the speed of sound in water:
.
The frequency of the wave is
so we can find its wavelength
by using the basic relationship between frequency, wavelength and speed of the wave:
Padded dashboards make automobiles safer because it will increase the time required to stop your head from moving forward during an accident. The increased stopping time results in a smaller force being applied to the person's head.