1.

By using dimensional analysis, convert 10 joule into ergs.

Answer»

1joule=1x(1kg/gm)¹x(1m/1cm)²x(1s/1s)⁻²

=1x(1000g/gm)X(100cm/1cm)²x(1s/1s)⁻²

=10⁷ 
THEREFORE n1(joule)=n2(ERG)
∴1 Joule=10⁷erg
:.10 joules =10 power 8 erg



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