Question

1. The unit of frequency is______.
2. Time taken by a body to complete one variation is called______.
3. Unwanted sound is called______.
4. loudness of sound depends on______of vibrations.
5. shrillness of sound is determined by the the______of vibrations.
6. when we touch a source of sound we can feel the______.​

Answer 1

Answer:

hope it helps

Explanation:

1. hertz

2. time period

3.noise

4. amplitude

5.pitch/frequency

6.vibration

Answer 2

Required Answer :

1. Hertz

2. Time period

3. Noise

4. Amplitude

5. Pitch

__________________

Explanation :

1. The unit of frequency is Hertz .

$\longrightarrow$ Frequency is calculated in the units of Hertz. Hertz can also be written as Hz. 1 Hertz is equivalent to 1 oscillation in 1 second.

2. Time taken by a body to complete one vibration is called time period.

$\longrightarrow$ Time period is equivalent to the time taken by a body to complete one vibration. SI unit of time period is seconds (s) . Time period is the reciprocal of frequency.

3. Unwanted sound is called noise .

$\longrightarrow$ Noise is the unwanted , jarring & disagreeable to our ear. It is produced by irregular vibrations.

4. Loudness of sound depends on amplitude of vibrations.

$\longrightarrow$ Loudness depends on amplitude of the vibrations. Amplitude is the maximum distance on any side of the mean position.

5. Shrillness of sound is determined by the the pitch of vibrations.

$\longrightarrow$ Pitch determines the shrillness of sound. For example :

• Men's voice have lower pitch, so their voice is not shriller.
• Whereas, women's have high pitch and their voice is more shriller than men.

6. When we touch a source of sound we can feel the vibration.

$\longrightarrow$ Sound is produced by the vibrations, so when we touch a source of sound we can feel the vibration. For an example :

• While talking, put your hand on you neck (where larynx is present) . You'll feel the vibrations produced by the two vocal cords which vibrate to produce sound.