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Astigmatism:
In this defect the surface of eye is not perfectly spherical. The eye has different focal point in dissimilar planes and image of an object is not focused clearly on the retina.
Correction:
Astigmatism is corrected by asymmetrical lenses which have dissimilar radii of curvature in dissimilar plane.
A motor has an output of 4.8kW, an efficiency of 80% and a power factor of 0.625 lagging when operated from a 240V, 50Hz supply. It is needed to improve the power factor to 0.9
explain quantization of charge
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When a metal becomes a superconductor, there is a tremendous decrease in it's: a) Total volume b) Electrical resistance c) Length d) Density Ans: While a
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A mirror cleaned with an alcohol solution is slightly colder right after it is cleaned. Why?
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You just need to use numerical methods to find temperature distribution in two or three dimensional plate; cylinder, sphere or you can model heat flow in any geometry with boundary
A large model rocket engine can make a thrust of 12.0 N upon ignition. This engine is part of a rocket with a total mass of 0.288 kg when launched. a) Draw a free-body
what are the examples of like and unlike parallel forces?
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