Question

Fill in the blanks:-
1. Sound is generated by the rhythmic _____ of any object.
2. The frequency of sound is measured in _____.
3. If ______ of sound is decreased, its loudness also decreases.
4. A medium is necessary for _______ of sound.

Q2. Match the pairs:-
1. Flute − Decibel
2. Frequency − Frequency more than 20000 Hz
3. Sound level − Vibrations in the air
4. Ultrasonic sound −Frequency less than 20 Hz
5. Infrasonic sound − Measured in Hz

Answer 1

☆Fill in the blanks☆

1. Sound is generated by rhythmic vibration of any object.

2. The frequency of sound is measured in Hertz.

3. If amplitude of sound is decreased, its loudness also decreases.

4. A medium is necessary for propagation of sound.

☆Match the following☆

1. Flute - Vibrations in the year

2. Frequency - measured in Hz

3. Sound level - Decibel

4. Ultrasonic sound - Frequency more than 20000 Hz

5. infrasonic sound - Frequency less than 20 Hz

Do mark brainliest ✌❤

Answer 2

$\LARGE\underbrace{\sf{\red{Required \; Answers:}}}$

Q1. Fill in the blαnks :-

1. Sound is generαted by the rhythmic vibrαtions of αny object.

2. The frequency of sound is meαsured in hertz.

3. If αmplitude of sound is decreαsed, its loudness αlso decreαses.

4. A medium is necessαry for propαgation of sound.

Q2. Mαtch the pαirs:-

1. Flute − Vibrαtions in the αir

2. Frequency − Meαsured in Hz

3. Sound level − Decibel

4. Ultrαsonic sound − Frequency more thαn 20000 Hz

5. Infrαsonic sound − Frequency less thαn 20 Hz

                  ______________                  

$\Large{\textsf{\textbf{\red{Know more :}}}}$

✿ Amplitude of vibrations: The intensity of sound is proportional to the  square of the amplitude of vibration.

✿ Frequency of vibrations: If frequency is higher then intensity of  sound is also higher.

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

                  ______________