what is a repeated movement, first in one direction and then in the opposite direction?, a wave , vibration, radio waves, longitudinal , transverse, what is a longitudinal wave, is one in which the particles vibrate parallel to the direction of the wave is travelling, a sound wave, the vibrations are at 90 degrees to the direction in which the wave id travelling , water waves, ultrasound waves, what are longitudinal waves made up of , compressions , rarefactions , movement of waves , compressions and rarefactions, what is an example of a longitudinal wave, water waves, sound waves, electromagnetic waves, what is a transverse wave, the vibrations are at 90 degrees to the direction in which the wave s travelling, parallel to the direction of the wave is travelling, water waves, sound waves, a type of wave, name an example of a transverse wave, water, sound waves, ultrasound, water waves, what is frequency, number of complete waves passing a fixed point in a second , the distance between a wave, the greatest displacement of a wave from its undisturbed postion , f=1/t, what is frequency measured in, voltage, meters, seconds, hertz, what is wavelength, the distance between two consecutive crests or troughs, greatest displacement of a wave, the number of waves that pass though a point, what is amplitude, the greatest displacement of a wave from its undisturbed point, number of complete waves in a time, distance of a wave, what is the wavelength for an longitudinal wave , the distance between the centre of one compression and the next, the distance of the vibrations , distances between the start and the end of a wave, the same as transverse, what is the amplitude of longitudinal waves, the maximum distance a particle moves from the centre of motion, the same as transverse, the distance of which the particles move, the wave equation is, wave speed= frequency x wavelength, wave speed= frequency + wavelength, wave speed= wavelength x frequency, wavelength= frequency x wave speed.

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