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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