Fluid Mechanics Viscosity Question 187
Question: A sample of metal weighs 210 gm in air, 180 gm in water and 120 gm in liquid. Then relative density (RD) of
Options:
A)Metal is 3
B)Metal is 7
C)Liquid is 3
D)Liquid is $ \frac{1}{3} $
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Answer:
Correct Answer: C
Solution:
Density of metal = $ \rho $ , Density of liquid = s If V is the volume of sample then according to problem $ 210=V\rho g $ ?(i) $ 180=V(\rho -1)g $ ?(ii) $ 120=V(\rho -\sigma )g $ ?(iii) By solving (i), (ii) and (iii) we get $ \rho =7 $ and $ \sigma =3 $ .
BETA
