Explanation
A relation between Y, η and σ is Y = 2η (1 + σ).
Ice is lighter than water. When ice melts the volume occupied by water is less than that of ice. Due to which the level of water go down
Depth of P below the free surface of water in the vessel = (1 + h). Since the liquid exests equal pressure in all direction at one level, hence the pressure at P = (H – h)ρ g.
Surface tension of a liquid is due to force of attraction between like molecules of a liquid i.e., cohesive force between the molecules.
The surface tension of liquid at critical temperature is zero.
When a highly soluble salt (like sodium chloride) is dissolved in water, the surface tension of water increases.
Force of viscosity is an electromagnetic force.
The rain drop while falling from great height will finally attain terminal velocity which is different for drops of different sizes.
In Bernoulli’s theorem only law of conservation of energy is obeyed.
A real gas can behave as an ideal gas at high temperature and low density.
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