Which of the following is Inexhaustible Natural Resources?
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Addition of suitable impurities into semiconductor, is called
Blood pressure is measured by _______.
The pitch of a sound depends on its ____.
Who proposed Continental drift theory?
Sound travels at a speed of 333 m/s in the air, thus, in 1 s, a distance of 333 m is travelled by
'Gallon' is commonly used
What is the unit of calorific value?