Q1 of 47 Page 13

Define sound.

Sound helps to communicate with one another, it travels from one point to another in the form of wave. It is also defined as sensation of hearing.

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2 Which object is vibrating when the following sounds are produced?
(i) The sound of a sitar or veena
(ii) The sound of the tabla
(iii) The sound of a school bell.
(iv) The buzzing of a bee or a mosquito.
(v) The sound of a bursting balloon.
(vi) The radio 3 Define amplitude.  4 What is called time period? 5 Define frequency.