1.2. Important Quantities and Symbols

Try these first

1. 1.

   What are the basic dimensions used in fluid mechanics?

   Hint

   Think about physical quantities.

2. 2.

   What is the dimension of Pressure?

   Hint

   Consider force and area relationship.

3. 3.

   What are the base dimensions used in fluid mechanics?

   • Length
   • Time
   • Mass
   • Volume
   • Length
   • Mass
   • Time

   Hint

   Consider basic quantities in physics.

4. 4.

   Is the dimension of pressure given by ML⁻¹T⁻²?

   • True
   • False

   Hint

   Break down the relationship of pressure.

5. 5.

   Calculate the shear stress for a fluid with viscosity 3 Pa.s flowing at a velocity of 2 m/s between a distance of 0.01 m.

   Hint

   Use the formula for shear stress that relates viscosity, velocity, and distance.

6. 6.

   A liquid has a density of 950 kg/m³. What is its specific weight in N/m³?

   Hint

   Remember to multiply the density by the acceleration due to gravity.