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In a triangle $ABC, \; a = 4, \; b = 3, \; \angle{A} = 60^{\circ}$, then $c$ is the root of the equation :

asked Dec 11, 2018 by pady_1

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In an experiment with 15 observations on $x$, the following results were available <br> $\displaystyle\sum x^2 = 2830, \; \displaystyle\sum x = 170$ <br> One observation that was 20, was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :

asked Dec 11, 2018 by pady_1

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The work function of a substance is 4.0 eV. Then longest wavelength of light that can cause photoelectron emission from this substance approximately

asked Nov 5, 2018 by pady_1

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