The density of a substance is its mass per unit volume.
The dimensions of regularly-shaped solids can be measured accurately using a ruler, a micrometer screw gauge or vernier callipers.
In order to determine the density of an irregularly shaped solid, it can be immersed in water and the volume of water displaced can be calculated from the initial and final volumes.
Mass can be measured on a digital balance.
Pressure is the force per unit area
F is the normal force and A is the cross-sectional area.
The dimensions of regularly-shaped solids can be measured accurately using a ruler, a micrometer screw gauge or vernier callipers.
In order to determine the density of an irregularly shaped solid, it can be immersed in water and the volume of water displaced can be calculated from the initial and final volumes.
Mass can be measured on a digital balance.
Pressure is the force per unit area
F is the normal force and A is the cross-sectional area.