Question

In which of the following mediums, does sound travel faster?
i. water
ii. iron pipe
iii. air iv. vacuum
b. The maximum displacement of a vibrating particle from the mean position is
i. frequency
ii. amplitude.
iii. time period. iv. velocity.
Which of the following instruments produce sound due to vibration of air column?
ii. guitar i. mouth organ
iii. sarod
iv. jal tarang
d. An echo produced by the reflection of a boy's voice from a mountain is heard 20 s after the sound is
produced. If the velocity of sound is 330 m/s, the distance between the mountain and the boy is
1. 3.3 km
ii. 6.6 km
iii. 330 m
iv. 660 m
e. Noise is produced by
i. regular vibrations
ii. irregular vibrations.
iii. mixture of regular and irregular vibrations. iv. none

Answer 1

Answer:

Sound waves need to travel through a medium such as a solid, liquid, or gas. The sound waves move through each of these mediums by vibrating the molecules in the matter. The molecules in solids are packed very tightly. Liquids are not packed as tightly as solids. And gases are very loosely packed. The spacing of the molecules enables sound to travel much faster through a solid than a gas. Sound travels about four times faster and farther in water than it does in air.

Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

Hence, the speed of sound is maximum in solid and it cannot travel through vacuum.

Explanation:

Thank u

Answer 2

Answer:

Ans1

2. iron pipe

Ans2

2. amplitude

Ans3

1. mouth organ

Ans4

1. 3.3km

Ans5

2. irregular vibrations

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