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CBSE Class 9 Answered

convert 1 joule(j) into 'Erg' by using dimensional analysis
Asked by Prakash | 21 Mar, 2018, 05:52: PM
answered-by-expert Expert Answer
Joule is the unit of work, work = force × Distance
 
SI unit of force = [ kg×m×s-2 ]
SI unit of distance = [ m ]
 
SI unit of work = [ kg × m2 × s-2 ]
 
1 kg = 1000 g;  1m = 100 cm
 
unit of Joule = [ kg × m2 × s-2 ] = [ 1000 g × 10000 cm2 × s-2 ] = 107 [g × cm2 × s-2 ] = 107 ergs 
Answered by Thiyagarajan K | 21 Mar, 2018, 06:09: PM
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