1.3. Definition of a Fluid

Try these first

1. 1.

   Define a fluid.

   Hint

   Think about how liquids behave when forces are applied.

2. 2.

   What does viscosity measure?

   Hint

   Consider how 'thick' or 'thin' a fluid feels.

3. 3.

   What defines a substance as a fluid?

   • A substance that can be solidified.
   • A substance that deforms continuously under shear stress.
   • A substance that cannot flow.

   Hint

   Consider how liquids like water behave.

4. 4.

   True or False: Viscosity decreases with increased temperature in liquids.

   • True
   • False

   Hint

   Think about how hot sauce pours compared to cold.

5. 5.

   If a liquid's viscosity increases by 50%, how does it affect fluid flow in a pipe?

   Hint

   Consider how thicker syrups flow compared to water when poured.

6. 6.

   A fluid with a density of 800 kg/m³ and a specific weight of 7.8 kN/m³ is tested. Calculate its specific weight.

   Hint

   Remember the relationship between density and specific weight with gravity.