Find the velocity which the edge of the shadow of man's head moves over the ground with if his height is 2 m
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a uniform 2 wire of mass 2.23×10 kg carries a current 1 ampere when 1.7 volt is applied across it. calculate its length and area of crosssection .if the wire uniform straight to double its lengt
h the new resistance density of copper is 8.92× 10000kg/m
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