Question

56. A variable immersion hydrometer is used to mea-
sure the specific gravity of two liquids. When the
hydrometer reads 0.8, half of the total length of
the hydrometer stem is immersed in the liquid
and when the hydrometer reads 0.6, 3/4th of the
total length of the hydrometer stem is immersed
in the liquid. What is the maximum and mini-
mum reading that can be measured by using this
hydrometer?​

Answer 1

Answer:

Solution :

(i) (v+la2)d=w (1)

(v+3la4)d=w (2)

Equate (1) and (2) to find a relation between v and la.

Substitute the value of la in equation to determine 'w' in terms of 'v'.

When the hydrometer reads minimum

(ii) d1=w (3)

When the hydrometer reads maximum

(v+la) d2=w (4)

Substitute the value of 'w' in (3) and (4) to setermine d1andd2.