Calculate the frequency (in Hz) of a sound wave of wavelength 5 m travelling with a speed of 360 m/s.
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Due to an acceleration of 4 m/s2 the velocity of a body increases from 10 m/s to 30 m/s in a certain period. Find the displacement (in m) of the body in that period.
Through which does light travel best?
If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become ___.
The first Europeans to come to India were
World War II started in the year?
Charles Darwin, the famous evolutionist, proposed his theory in which one of his books ?
What was invented by Zacharias Jansen?