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Q. Jingdan turned a screwdriver into a magnet by rubbing it with a strong bar magnet to pick up a screw that has fallen into an inaccessible spot.
How could he demagnetize his screwdriver after picking up the screw?
He could drop it, heat it, hit it with a hammer, or somehow otherwise jiggle the magnetic domains into randomness.
Give a mathematical expression for linear width of principal maxima in case of single slit Fraunhofer diffraction.
One source of a star's energy is the fusion of two deuterons to form an alpha particle plus a gamma ray. a. Write down the nuclear equation for this fusion. b. Measure the m
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Viscosity in fluids is the analog of friction in solids. Both are methods by which the kinetic energy of moving bodies can be changed into thermal power. In the absence of friction
Does a soccer ball go faster in the air on a cold or hot day? On a hot day, the air molecules have much kinetic energy - they move more freely. They will move out of the way of
ELECTRICAL MACHINES: Efforts are being made at present to develop electrical machines and transformers utilising super conductivity calculators. It shows that if we would use co
NEWTON'S SECOND LAW OF MOTION: This law states that "A force applied on body produce acceleration in its own direction. The acceleration differs directly with the applied force
A copper wire whose diameter is 0.16 cm carries a steady current of 10 A. What is the current density of the wire?Also calculate the drift velocity of the electrons in copper.
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