Question

FITB:
(a) Sound is generated by the rhythmic …….. of any object.
(b) The frequency of sound is measured in ……………. .
(c) If ………… of sound is decreased, its loudness also decreases.
(d) A medium is necessary for …………. of sound.

MTP:
Group ‘A’ ⠀⠀⠀ ⠀⠀⠀ ⠀⠀⠀Group ‘B’
(a) Flute ⠀-⠀⠀ ⠀(1) Frequency less than 20 Hz
(b) Frequency - ⠀⠀(2) Frequency more than 20000 Hz
(c) Sound level ⠀-⠀⠀(3) Vibrations in he air
(d) Ultrasonic ⠀-⠀⠀ (4) Measured in Hzsound
(e) Infrasonic ⠀-⠀⠀ (5) Decibel sound

4. Write answers to the following questions.
(a) How is the sound produced?
(b) What does the intensity of sound depend upon?

Answer 1

Answer:

the correct answers would be

1. Vibration
2. Hertz Hz
3. Amplitude
4. Transportation

Now the next

• (a) - 3
• (b) - 4
• (c) - 5
• (d) - 2
• (e) - 1

Now the next

1. Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium.
2. Intensity results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound. ... It depends on the amount of energy that started the waves. Greater amplitude waves have more energy and greater intensity, so they sound louder.

Hope this will help you.

Answer 2

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Q.] Fill in the blanks:

a. Sound is generated by the rhythmic vibrations of any object.

b. The frequency of sound is measured in Hertz (Hz).

(c) If the amplitude of the sound is decreased, its loudness also decreases.

(d) A medium is necessary for propagation of sound.

Q.] Match the pairs:

1. Flute ☞ Vibrations in the air

2. Frequency ☞ Measured in Hz

3. Sound level ☞ Decibel

4. Ultrasonic sound ☞ Frequency more than 20000 Hz

5. Infrasonic sound ☞ Frequency more than 20 Hz

Q.] Write answers to the following questions.

a. How is the sound produced?

☞ Vibrations are produced in an object when it is struck. Vibrating object is an object produces sound.

b. What does the intensity of sound depend upon?

☞ The intensity of sound depends upon:

i. Amplitude of  cibrations: The intensity of sound is proportional to the square of the amplitude of vibration.

ii. Frequency of vibrations: If Frequencyis higher then intensity of sound is also higher.

iii. Distance from the source of sound: If the distance between the listener & the source of sound is less, than intensity of sound can be felt greater.

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