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(1) These rays transmitted in the forward direction of medium with a finite speed.
(2) Energy and momentum are transmitted in the direction of propagation of waves without real transmission of matter.
(3) In progressive pulse, equal changes in density and pressure occurs at every points of medium.
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Explain Motion in 2 Dimensions When motion occurs in two dimensions, position, displacement and distance, speed, velocity and acceleration can be described using the x-y plane.
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