An object having a mass 'm' moving with a velocity 'v' possesses a kinetic energy 'K'. If its velocity is doubled, its kinetic energy will become:
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A man lifts a luggage of 25 kg from the ground and puts it on the head, 2.5 m above the ground. If the value of g = 10 m/s2, then the value of work done by him on the luggage is
Which of the following does NOT contribute to sparkling of diamonds?
Which of the following instruments is used to measure electric current?
The diameter of the reflecting surface of a spherical mirror is called a/an
Which of the following coloured light has the lowest frequency?
Blocking in experimental design is useful because it
Which of the following changes when a body performs uniform circular motion?