THE APPLICATION OF ARCHIMEDES' PRINCIPLE

HYDROMETER:-

• A hydrometer is an instrument to measure the relative density of liquids.
• It consists of a tube with a bulb at one end. Lead shots are placed in the bulb to weigh it down and enable the hydrometer to float vertically in the liquid.
• In a liquid of lesser density, a greater volume of liquid must be displaced for the buoyant force to equal to the weight of the hydrometer so it sinks lower.
• Hydrometer floats higher in a liquid of higher density.
• Volume of liquid displaced decreases when density of liquid increases.
• The height of hollow tube from surfaces increases.
• Upthrust force=weight of liquid displaced.
• Density is measured in the unit of g cm-3.