The characteristics of a true beam balance are
Both the arms must be of equal length
Both the pans must be of equal masses
On lifting up the beam balance, the rod should be horizontal and pointer vertical
All of the above
Unit of relative density is
g cm-3
g cm2
g m-3
No unit
Hot air and hot liquid has the tendency to rise up, this is called
Convection
Radiation
Induction
None of these
Unified atomic mass unit, 1U =
1.6 x 10-19 kg
1.5 x 10-18 kg
1.66 x 10-27 kg
1.5 x 10-27 kg
1kgf =
1 N
105 dyne
10 N
Relative density is the ratio of the density of the substance to the density of water at
0°C
1°C
5°C
4°C
A specific gravity bottle weight 25g. When fully filled with water, its weight 55g. When filled with alcohol, it weight 49g. Find relative density of alcohol.
129 g
2.5
0.8
31 g
Density of a liquid is measured using
Thermometer
Calorimeter
Galvanometer
Hydrometer
Specific gravity bottle is used to determine
Relative density of a liquid
Mass
Weight of materials
Temperature of a liquid
To find the density of a substance, we should know its
mass and area
weight and area
mass and volume
mass and length
