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As defined in physics, work is: a) A scalar quantity b) Always a positive quantity c) A vector quantity d) Always zero Ans: As defined in physics, work
What is Heat? We now have several scales for measuring temperature, but first let's ask, “Is temperature the same as heat?” If I add heat to a pot of water, the water's temperatu
What is ground wave?
Avogadro constant; L; NA (Count A. Avogadro; 1811) The number of items in a sample substance is equivalent to the number of atoms or molecules in a sample of ideal gas that is
Q. Why X-rays are not used in microscopes? 1) The wavelength of X-rays is slighter than that of the visible light. 2) X-rays can't be focussed as visible radiations are foc
Why do dead bodies float in water ?
A device which changes light energy into electrical energy is known as photoelectric cell. It is also known as photocell or electric eye.
It is the demagnetising force which is necessary to neutralize completely the magnetism in the magnetism material after the external magnetic field is reduced to zero.
A CAR MOVING AT 25m/s ALONG A STRAIGHT LEVEL ROAD EXPERIENCE A RESISTANCE WHICH PRODUCES A RETARDATION OF 0.0001 V^3,WHERE V IS THE VELOCITY IN m/s.FIND THE DISTANCE TRAVELLED AND
Theory of law of conservation of mechanical energy
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