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प्रश्न
Give a scientific reason.
We can hear the movement of a mosquito's wings but we cannot hear the movement of our hands.
उत्तर
The frequency of the sound produced by the movement of mosquitoes' wings is in the audible range of humans, whereas that produced by the movement of our hands falls in the inaudible range. Due to this reason, we can hear the movement of a mosquito's wings but cannot hear the movement of our hands.
संबंधित प्रश्न
The ratio of amplitude of two waves is 3:4. What is the ratio of their loudness?
A person standing between two vertical cliffs and 480 m from the nearest cliff shouts. He hears the first echo after 3s and the second echo 2s later. Calculate:
1)The speed of sound.
2) The distance of the other cliff from the person
The quality of a sound depends on the amplitude of wave.
Name the characteristic of sound related to its frequency
Figure shows two jars A and B containing water up to different heights. Which will produce sound of higher pitch when air is blown on them?
Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality? Give reason for your answer.
Two waves of the same pitch have amplitudes in the ratio 1 : 3 What will be the ratio of their
- loudness,
- pitch?
How does the wave pattern of a loud note differ from a soft note? Draw a diagram.
A man playing a flute is able to produce notes of different frequencies. If he closes the holes near his mouth, will the pitch of the note produced, increase or decrease? Give a reason.
How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?
