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प्रश्न
Write the answer in your own words.
What is meant by vibration?
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उत्तर
The rapid oscillations or to-and-fro movements of an object are called vibrations. Vibrating objects have a particular speed.
संबंधित प्रश्न
What minimum distance is required between the source of sound and the reflecting surface to hear an echo ? Give reason.
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
Name the physical qantity whose SI unit is 'hertz'.
If 20 waves are produced per second, What is the frequency is hertz?
Describe a simple experiment to show that the prongs of a sound producing tuning fork are vibrating.
Fill in the blank with suitable word.
When the frequency of the sound is increased, the wavelength ____________.
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 key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
Describe an experiment to show that sound cannot travel through vaccum.
Infrasound can be heard by
