The ratio of change in velocity of a body to the total time taken by it is its __________________.
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Which among the following determines the pitch of a sound?
Formula for distance is
What is the unit of relative density?
Sextant is an instrument used in which of the following ?
The spring balance works on the principle of __________
Which of the following device is used to measure humidity?
To hear a distinct echo the time interval between the original sound and the reflected sound must be at least
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