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...Unit part physical world of measurement quantities prefixes dimensional analysis prepared by er veenus girdhar and its types quantity a which can be measured various happenings explained expressed in form laws is called for example length mass time force etc on the other hand life e g happiness sorrow are not because these cannot necessary to determine magnitude compare two similar prove or equations any represented completely your say kg here o represents numerical value under consideration thus expressing we choose then find that how many times contained given therefore q nu n u also as changes will change but product remain same constant three ratio scalar vector those it has no relative density object water at oc refractive index velocity light air medium strain dimension original angle exceptional though arc radius still requires degrees radians specify along with have only they do direction work energy added subtracted help following ordinary addition subtraction both displacemen...