A piece of Iron of volume 30 cm3 has a mass of 234g. Find the density of Iron?
7.8 g cm-3
0.78 g cm-3
702 g cm-3
7.02 g cm-3
Hot air and hot liquid has the tendency to rise up, this is called
Convection
Radiation
Induction
None of these
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
To find the density of a substance, we should know its
mass and area
weight and area
mass and volume
mass and length
Density of a liquid is measured using
Thermometer
Calorimeter
Galvanometer
Hydrometer
Unit of relative density is
g cm-3
g cm2
g m-3
No unit
Specific gravity bottle is used to determine
Relative density of a liquid
Mass
Weight of materials
Temperature of a liquid
Mass is measured by a
beam balance
spring balance
physical balance
Both a and c
A piece of iron sink in water and float in mercury because
Iron is heavier than water but lighter than mercury
Iron is lighter than water but heavier than mercury
Density of water is more than Iron
All of these
Practical applications of convectional current is/are
ventilators constructed at top of the walls
cooling unit in a fridge is fitted at the top
Air conditioner in a room at some height