which of the following physical quantity is dimensionless
If the velocity of a body is doubled its momentum ________________.
A body of mass 8 kg is moving with a velocity of 4 m/s, find its momentum.
Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules.
'Torr' is a unit of _______.
What is the velocity of sound in air?
The power of a lens is —2.5 D. The type of lens and its focal length are respectively:
Which one of the following is the unit of force?
Which of the following are Mechanical waves?
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