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प्रश्न
The region in a sound wave, with higher pressure and density, is called ______ and that with low pressure and density is called ______.
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उत्तर
The region in a sound wave, with higher pressure and density, is called compression and that with low pressure and density is called rarefaction.
संबंधित प्रश्न
Which of the following cannot transmit sound? Water, Vacuum, Aluminium, Oxygen gas
What is the general name of the waves consisting of :
(a) compressions and rarefactions?
(b) crests and troughs?
Name four ways in which sound can be produced.
How does sound from a sound producing body travel through air to reach our ears? Illustrate your answer with the help of a labelled diagram.
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 musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through.
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
Different sound notes have different ______.
Write the answer in your own words.
What is meant by vibration?
Describe an experiment to show that sound cannot travel through vaccum.
