Question

What is the law of floatation? Name an instrument developed on the basis of the law of floatation.

Answer 1

1. The principle of floatation states that when an object floats on a liquid the buoyant force that acts on the object is equal to the weight of the object.
2. A hydrometer is based on the principle of floatation.
3. A hydrometer is a device used for measuring the relative density of a liquid directly.
4. It usually consists of a glass float with a long thin stem that is graduated.
5. The glass float is a large hollow bulb that increases with buoyancy.