[amp_mcq option1=”are viscous” option2=”possess surface tension” option3=”are compressible” option4=”possess all the above properties” correct=”option4″]
The correct answer is D. Practical fluids possess all the above properties.
- Viscosity is a measure of a fluid’s resistance to flow. It is caused by the internal friction of the fluid’s molecules.
- Surface tension is the tendency of a fluid’s surface to contract. It is caused by the attraction of the fluid’s molecules to each other.
- Compressibility is a measure of how much a fluid can be compressed. It is caused by the distance between the fluid’s molecules.
All practical fluids have these properties. For example, water is a practical fluid that is viscous, has surface tension, and is compressible.