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Poling process :...

Poling process `:`

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`{:(,NH_(4)HS(s),hArr,NH_(3)(g),+,H_(2)S(g),),(t=0,0.1"mole",,,,,),("for max. pressure",-,,0.1,0.1,,0.20"gaseous mole"),(Pxx16.4=0.2xx0.82xx500,,rArr,,P=0.5,,):}`
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Two like magnetic poles :

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From the top of a pole of height 150 m, the angles of depression of another pole’s upper and lower end are alpha and beta respectively. If tan alpha = 4//3, tan beta = 5//2 , then the distance of the top of two poles is :