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Floatation–Density and Relative Density | Class 9
Density We describe the lightness or heaviness of different substances by using the word density. The density of a substance is defined as mass of the substance per unit volume. That is The density of a given substance, under specified conditions remains the same. The therefore the density of a substance is one of the…
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Floatation | Archimedes’ Principle & Buoyancy | Class 9
Pressure and Fluids All liquids and gases are called as fluids. A solid exerts pressure on a surface due to its weight. Similarly, fluids have weight, and they also exert pressure on the base and walls of the container in which they are enclosed. A fluid exerts pressure in all directions even upwards. Buoyancy To…