Which of the following statements is true?
The velocity of sound is :
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Which of the following is based on the principle of nuclear fusion?
Find the acceleration (in m/s2) produced in a body of mass 2 kg when a force of 8 N is applied on it.
What will be the acceleration produced when a force of 21 N is applied on an object of mass 3 kg?
An object is placed at the centre of curvature of a concave mirror. Its image is formed at
The relative density of a substance is the ____.
The power of _____________ is expressed in terms of a magnitude on a scale called Richter scale.