Question
Thu June 09, 2011 By: Spoorthy Prakasha

Energy density and pressure have same dimensions. comment and can there be a physical quantity without units and without dimensions

Expert Reply
Mon June 13, 2011
'Co-efficient of friction' is a physical quantity that has no unit and no dimensions.
Though energy density and pressuire have the same dimensions, they do not share the same units, hence they are different physical quantities.
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