Acoustics

 Is a physical quantity of vector character. It's the distance travelled in unit time (m/s) ( different waves travel at different speeds.

It’s then of complete waves in one second (Hz). Is the number of waves that pass a point per second. The __//period//__ is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example with a waves of 21 cycles in 5 second the frequency is 4.2 Hz.
 * F= cycles /time **

It’s the distance between matching points on the wave (m) this is sometimes called lambda. The large of Wavelength depend of the speed, (a short wavelength creates a wave with a high frequency and a long wavelength creates a wave wiyh a low frequency) For example. When you move an object slowly there is a large wavelength, but if you move an object quickly there is a small wavelength. w = wave speed / frequency

Waves carry energy fron one place to another. Sound, light and radio signals all travel in the form of waves (the radio waves is most fast it’s travel at the speed of light 300,00 kilometres per second) · __//Transverse//:__ Vibration at right angle to direction of travel. The oscillations occurring perpendicular to the direction of energy transfer. · __//Longitudinal//__: Vibration parallel to direction of travel. The oscillations of the medium is in the same direction or opposite direction as the motion of the wave.

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