Question

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Answer 1

Answer:

Explanation:

I.

1. Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
2. Oscillatory motion can be termed as the repeated motion in which an object repeats the same movement over and over. In the absence of friction, the oscillatory motion would continue forever; but in the real world, the system eventually settles into equilibrium.
3. All oscillatory motions are periodic because each oscillations gets completed in a definite interval of time. On the other hand, all periodic motions may not be oscillatory.
4. Every oscillatory motion is periodic but every periodic motion is not oscillatory for example motion of earth around the sun is periodic but not oscillatory. It does not oscillate around any fixed point, bur rather moves in an ellipse around the sun in a time period of one year.

II.

1. Sound is a vibration that propagates as a wave, through a transmission medium such as a gas, liquid or solid.
2. Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.)
3. Sound waves in air (and any fluid medium) are longitudinal waves. In sound waves, particles of the medium through which the sound is transported vibrates parallel to the direction that the sound wave moves.
4. The distance between two successive compression and distance between a compression and the adjoining rarefaction is called wavelength.

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