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amplitude
velocity
wavelength
frequency
Lux is the SI unit of
On a rainy day, small oil films on water show brilliant colours. This is due to
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
Materials for rain-proof coats and tents owe their water-proof properties to
RADAR is used for
Sound of frequency below 20 Hz is called
On a clean glass plate a drop of water spread to form a thin layer whereas a drop of mercury remains almost spherical because
Brass gets discoloured in air because of the presence of which of the following gases in air ?
Which is a non metal that remains liquid at room temperature ?
Chlorophyll is a naturally occurring chelate compound in which central metal is
