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QUANTUM NUMBERS (Principal, Azimuthal, Magnetic and Spin)

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Diagonal Relationship between Beryllium and Aluminium || Relation between Beryllium and Aluminium

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Math question

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A tower, x metre, has a flagstaff at its top. The tower and flagstaff subtends equal angles at a point distant y metre from the foot of the tower. Then find the length of the flagstaff ( in metre). 
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