Question

State whether the following are trur (T) or False (F) .
1. The region in air where particles are compressed together is known as rarefaction.​

Answer 1

Answer:

explanation down below

Explanation:

energy of the sound wave passes through it. The motion of the particles is parallel (and anti-parallel) to the direction of the energy transport. This is what characterizes sound waves in air as longitudinal waves.

Compressions and Rarefactions

A vibrating tuning fork is capable of creating such a longitudinal wave. As the tines of the fork vibrate back and forth, they push on neighboring air particles. The forward motion of a tine pushes air molecules horizontally to the right and the backward retraction of the tine creates a low-pressure area allowing the air particles to move back to the left.

Because of the longitudinal motion of the air particles, there are regions in the air where the air particles are compressed together and other regions where the air particles are spread apart. These regions are known as compressions and rarefactions respectively. The compressions are regions of high air pressure while the rarefactions are regions of low air pressure. The diagram below depicts a sound wave created by a tuning fork and propagated through the air in an open tube. The compressions and rarefactions are labeled.

Answer 2

Question -

• True or False.

• The region in air where particles are compressed together is known as rarefaction.

↬ False.

Correction -

• The region in air where particles are compressed together is known as compression.

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Know more -

Rarefaction -

• The region in air where air particles spread out is known as rarefaction.

Sound -

• It is the mechanical energy which causes sensation of hearing.

• Its S.I. unit is pascal.