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प्रश्न
Different sound notes have different ______.
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उत्तर
Different sound notes have different frequencies.
संबंधित प्रश्न
Fill in the blank.
Sound is produced when a body ______.
Name the physical qantity whose SI unit is 'hertz'.
If 20 waves are produced per second, What is the frequency is hertz?
Name four ways in which sound can be produced.
A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
(a) what is their wavelength?
(b) what is their frequency
(c) what is their speed?
A sound producing body is at considerable distance from a man. There can be four different media W, X, Y and Z between the sound producing body and the man. The medium X brings the sound to man most quickly whereas medium Z takes the maximum time. The time taken by medium W in bringing sound to man is less than that of X but more than that of Z. The medium Y, however, fails to bring the sound from the sound producing body to the man. Which medium could be the one :
(a) having on fixed shape and no fixed volume?
(b) having a fixed volume but no fixed shape?
(c) having the same composition as that on the moon?
(d) having a fixed shape and a fixed volume?
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
Match the following:
| Human larynx | Vibrations of metal arms |
| Loudspeaker | Vibrations in air column |
| Jal-Tarang | Vibrations in vocal cords |
| Tuning fork | Vibrations in strings |
| Sitar | Vibrations of screen |
What is vibration?
______ is produced when an object is set to vibrate.
