g Describe the difference between the concepts of particle velocity and wave velocity in wave motion. (b) Describe the directions associated with the particle velocity and the wave velocity for both: (i) longitudinal as well as (ii) transverse waves.

Answers in explanation

Explanation:

A.

PARTICLE MOTION:

Particle motion is the motion of the particles that create the disturbance. These particles move in the medium and create the disturbance or the wave.

WAVE MOTION:

Wave motion is the propagation of energy. It is a pattern created by moving particle. It has an amplitude, period and frequency.

(b)

(i) Longitudinal Waves:

In longitudinal waves the direction of wave motion and longitudinal motion are same. It means both are parallel. Example of longitudinal waves is the sound waves.

(ii) Transverse Waves:

In Transverse waves the direction of wave motion and longitudinal motion are perpendicular to each other. Example of longitudinal waves are the electromagnetic waves.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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