1.

Convert the following into metre (i) 40 Em (thickness of Milky way galaxy) (ii) 1.4 Gm (diameter of Sun) (iii) 41 Pm (distance of nearest star)

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Solution :`{:("(i)1 Em,i.e., EXAMETRE"=18^(18)m,therefore,40Em=40xx10^(18)m=4xx10^(19)m.),("(ii) 1 Gm, i.e., GIGAMETRE "=10^(9)m,therefore,1.4Gm=1.4xx10^(9)m):}`


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