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Physics

A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table. The total mass of the chain is 4kg. What is the work done in pulling the hanging part of the chain up to the table. (Take g =10 m/s²)

(a) 7.2 J (b) 3.6 J (c) 120 J (d) 1200J

Chemistry

Amongst the following, identify the species with an atom in +6 oxidation state

Mathematics

If Pr stands for, then sum of the series is

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