Physics 10th ICSE: Sounds [Semester 1]

Question 1

How is sound produced?

Answer 1

Produced when a body vibrates and reaches us through vibrations of the particles of the surrounding medium

Question 2

What does sound require for propagation?

Answer 2

A medium

Question 3

What range is the audible range of frequency?

Answer 3

20 Hz to 20,000 Hz

Question 4

What is the sound of frequency above 20,000 Hz?

Answer 4

Ultrasonic

Question 5

What is the sound of frequency below 20 Hz?

Answer 5

Infrasonic

Question 6

Name 2 points of distinction between light and sound waves.

Answer 6

Light:

1. electromagnetic waves
2. Can travel in a vacuum

Sound:

1. Mechanical Waves
2. Requires material medium for propagation, ie. can’t travel in a vacuum

Question 7

What is an echo?

Answer 7

The sound heard after reflection from a distant obstacle after the original sound has ceased.

Question 8

What effect takes place when there are repeated reflections at the reflecting surface, prolonging the sound?

Answer 8

Reverberation

Question 9

¯_( ͡° ͜ʖ ͡°)_/¯

Answer 9

insert correct answer

Question 10

Name 2 uses of SONAR.

Answer 10

> Dolphins: to detect their enemies using ultrasonic waves

> Bats: uses infrasonic waves to avoid obstacles

Question 11

What does the term ‘SONAR’ stand for?

Answer 11

Sound Navigation And Ranging

Question 12

What is imaging human organs called in the medical field?

Answer 12

Ultrasonography

Question 13

Define the term ‘Time Period (T)’.

Answer 13

Time taken by the particle in the medium to complete one vibration

Question 14

What is defined as the number of vibrations made by the particle of the medium in one second?

Answer 14

Frequency

Question 15

Define the term ‘Amplitude’.

Answer 15

Maximum displacement of the particle of the medium on either side of its mean position