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Longitudinal wave - Wikipedia, the free encyclopedia (537 words) |
 | Longitudinal waves, also referred to as compressional waves or pressure waves, are waves that have vibrations along or parallel to their direction of travel. |
| For sound waves, the amplitude of the wave is the difference between the pressure of the undisturbed air and the maximum pressure caused by the wave. |
| Maxwell's equations lead to the prediction of electromagnetic waves in a vacuum, which are transverse (in that the electric fields and magnetic fields vary perpendicularly to the direction of propagation). |
| Pressure - definition of Pressure in Encyclopedia (764 words) |
| Blood pressure is still measured in millimetres of mercury in most of the world, and lung pressures in centimeters of water are still common. |
| Static pressure is the pressure due to the density and depth of a fluid. |
| The pressure of a moving fluid can be measured using a Pitot probe, or one of its varations such as a Kiel probe or Cobra probe, connected to a manometer. |
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