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why gravitational energy for a system of particles is found by first finding the gravitational energy between individual particles and then adding it up?
Ans) It is a scalar quantity.Basic laws of physics state that we can directly add or subtract scalar quantities.If you put a mass of 10 kgs on a mass of 20 kgs, the total mass is 30 kgs.We add up, because mass is a scalar quantity.So is PE.
If we permit monochromatic light to fall normally on the surface of lens, then circular interference fringes of radius r can be consider in the reflected light. This circular fring
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Weiss constant: A characteristic constant based on the material, utilized in calculating the susceptibility of paramagnetic materials.
the principle
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Derive mathematical equation for an electromagnetic wave travelling in a charge free conducting medium in terms of electric field vector.
Q. Write any three medical applications of laser. Medical applications (i) In medicine micro surgery has befall possible due to narrow angular spread of the laser beam.
faint, young sun paradox Theories of stellar evolution denote that as stars mature over the main sequence, they steadily grow hotter & brighter; calculations recommend that at
2 Kg of ice at -20 degree C is mixed with 5Kg of water 20 degree C in an insulating vessel having negligible heat capacity. Calculate the final mass of water remaining in the comta
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