# Q16 all parts

Dear Student,

Mass of stone = 15.1 g (air)
Weight of stone in liquid = 10.9 gf
Weight of stone in water = 9.7 gf

a) Weight in air = 15.1 gf

b) Volume = Mass/Density = U
= (15.1 - 9.7) / 1 = 5.4 cm3

c) Relative density of stone = 15.1 / (15.1-9.7)
= 15.1/5.4 = 2.79 $\approx$2.8

d) Relative density of liquid = (15.1 - 10.9) / (15.1 - 9.7)           [using (w1 - w2) / (w1 - w3) ]
=4.2/5.4 = 0.77 $\approx$ 0.78