Question

Out of solids, liquids and gases :1-in which medium sound travels slowest? 2-in which medium sound travels fastest?

Answer 1

sound travels fast in solids(1550m/s), as the molecules are closely packed.
sound travels slowly in air(330m/s), as the molecules are very far from one another.

Answer 2

(a) In gases, sound moves slowest.

(b) Sound moves most quickly in solids.

Explanation:

• The gaps among the molecules are smaller in solids, and hence the atoms are packed more closely than in liquids (water) and gases.
• The molecules then collide rapidly with each other and convert the vibrational energy.
• Furthermore the molecules are closer to each other in liquids than in gases. Consequently the following details are inferred:

Out of gases, liquids and solid:

(a) In gases, sound moves slowest.

(b) Sound moves most quickly in solids.

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