# How many poise is one pascal second?

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How many poise is one pascal second?
1. 12
2. 13
3. 14
4. 10

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Correct Answer - Option 4 : 10

Explanation

Viscosity:

• The relative motion between different layers of liquid or gases is opposed by a force, which is known as the Viscous force and this property is known as Viscosity.
• Its S.I unit is Poise.
• One poise is equal to 0.1 Pa-s (Pascal-Second).

∴ 1 Pa -sec = 10 poise.

Poise is the CGS unit, whereas Pa -sec is the SI unit.

Note:

Some properties of viscosity are:

• This is the property of both liquids and gases.
• In the case of liquid, it is seen because of the cohesive force between the molecules of the liquid.
• In the case of a gas, it is seen because of the diffusion of its molecules from one layer to other layers.
• The viscosity of gases is very less than that of liquids.
• No viscosity is there in solids.
• Viscosity on an ideal fluid is always zero.
• The viscosity of liquids decreases with the rise in temperature.
• The viscosity of gases increases with the rise in temperature.