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The mass of an empty density bottle is 30 g, it is 75 g when filled completely with water and 65 g when filled completely with a liquid. Find relative density of liquid. - Physics

Sum

The mass of an empty density bottle is 30 g, it is 75 g when filled completely with water and 65 g when filled completely with a liquid. Find relative density of liquid.

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Solution

Mass of empty density bottle (M1) =30 g
Mass of bottle + Water (M2) 75 g
Mass of liquid + Liquidx (M3)= 65 g
Mass ofwater=M2—M1=75—30=45 g

Mass of water in the density bottle =75 — 30 = 45 g
∴ Volume of water in density bottle = 45 cc
and mass of equal volume of liquid in density bottle 65—30 = 35g

R.D. of liquid = `("mass  of  45  cc  of  liquid" )/("mass  of  45  cc  of  water")`= `35/45`=`7/9`

                      =0.77

Concept: Determination of Density of a Liquid
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APPEARS IN

Selina Concise Physics Class 8 ICSE
Chapter 2 Physical Quantities and Measurement
Numericals | Q 11.3 | Page 36
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