51

What is an intrapersonal skill?

Intrapersonal: Existing or occurring within the individual self or mind.

Intrapersonal skills are talents or abilities that reside within the individual and aid him or her in problem solving.

52

What are the properties of fluids?

Properties of fluids determine how fluids can be used in engineering and technology.

They also determine the behavior of fluids in fluid mechanics.

The following are some of the important basic properties of fluids:

v  Density

v  Viscosity

v  Temperature

v  Pressure

v  Specific Volume

v  Specific Weight

v  Specific Gravity

53

What are fluids?

Fluid is a substance that is capable of flowing.

It has no definite shape of its own.

It assumes the shape of its container.

Liquids and gases are fluids.

54

What are the types of fluids?

Fluids can be classified into four basic types.

They are:

1. Ideal Fluid

2. Real Fluid

3. Newtonian Fluid

4. Non-Newtonian Fluid

55

What do you mean by the term ‘property’, in science?

A basic or essential attribute of an element, fluid, material, object, a state of matter, an individual or a member of a class.

56

What is an Ideal fluid?

An Ideal Fluid is a fluid that has no viscosity.

It is incompressible in nature.

Practically, no ideal fluid exists.

57

What is a Real fluid?

Real fluids are compressible in nature. They have some viscosity.

Examples: Kerosene, Petrol, Castor oil

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What is a Newtonian fluid?

Fluids that obey Newton’s law of viscosity are known as Newtonian Fluids.

For a Newtonian fluid, viscosity is entirely dependent upon the temperature and pressure of the fluid.

Examples: water, air, emulsions

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What is a Non-Newtonian Fluid?

Fluids that do not obey Newton’s law of viscosity are non-Newtonian fluids.

Examples: Flubber, Oobleck (suspension of starch in water)

60

What is Density?

Density is the mass per unit volume of a fluid.

In other words, it is the ratio between mass (m) and volume (V) of a fluid.

Density is denoted by the symbol ‘ρ’. Its unit is kg/m3.

In general, density of a fluid decreases with increase in temperature. It increases with increase in pressure.

 

The ideal gas equation is given by:

The above equation is used to find the density of any fluid, if the pressure (P) and temperature (T) are known.

Note: The density of standard liquid (water) is 1000 kg/m³.