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प्रश्न
What are mechanical waves?
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उत्तर
The waves which travel in the medium through the vibrations of the medium particles about their mean positions are called mechanical waves.
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संबंधित प्रश्न
Define the resonance phenomenon.
Resonance is a special case of ______ vibrations, when frequency of the driving force is ______ natural frequency of the body.
Differentiate between the forced and resonant vibrations.
Why are the stringed instruments like guitar provided with a hollow sound box?
When a body vibrates under a periodic force, the vibrations of the body are ______.
In fig. , P, Q, R and S represent test tubes each of height 20 cm which are filled with water upto heights of 10 cm, 14 cm, 16 cm and 18 cm respectively. If a vibrating tuning fork is placed over the mouth of test tube Q, a loud sound is heard.
(i) Describe the observations with the tubes P, R and S.
(ii) Give the reason for your observation in each case.
(iii) State the principle illustrated by the above experiment.
On keeping the stem of a vibrating tuning fork on the surface of a table, a loud sound is heard. Give reason.
State two ways in which resonance differs from forced vibrations.
What do you understand by free (or natural) vibrations?
Describe a simple experiment to illustrate the phenomenon of resonance and explain it.
