A pieceof stoneweight18gin water. 20 n in gerosence( relativedensityof kerosence= 0.8) .Find(I )massof stone- piece , (ii )volumeof stone- pieceand (iii )densityof stone- piece .

A pieceof stoneweight18gin water. 20 n in gerosence( relativedensityof

1.	A pieceof stoneweight18gin water. 20 n in gerosence( relativedensityof kerosence= 0.8) .Find(I )massof stone- piece , (ii )volumeof stone- pieceand (iii )densityof stone- piece .
Answer» Solution :InCGSsystem ,themagnitudesfo densityandspecificgravityare same.Morover , themagnitudesof massM expressedin unita andweightWexpressedin unitg- wtare same. Letmassof stone= M , volume= V `therefore ` WEIGHTOF samevolumeof water`= V xx 1 = V =` Apparentlossofweightof stoneinwater, Given, `M- V = 18` similarlyin CASEOF kerosene`, M- 0.8V=200 ` Subtracting(1)from(2), we get `0.2V=2 ` or , `V=(2)/(0.2) = 10cm^(3) ` subsitingin EQUATION(1) `M-10= 18or ,M=28g ` density ofstone`=(M)/(v )= (28) /(10)= 2.8* CM ^(-3)` `therefore ` densityof stone`=( M )/(v ) =(28) /(10)= 2.8g * cm ^(-3)`