8.3.1. Alignment of Gravity with Coordinate Axes

Try these first

1. 1.

   What happens to shear stress when a fluid is at rest?

   Hint

   Think about the definition of static fluids.

2. 2.

   How is pressure defined mathematically?

   Hint

   Consider the formula for pressure.

3. 3.

   What is the pressure in a static fluid?

   • Varies with velocity
   • Increases with depth
   • Depends on surface tension

   Hint

   Think about how depth influences fluid pressure.

4. 4.

   Gauge pressure is measured relative to which reference point?

   • Atmospheric pressure
   • Absolute zero

   Hint

   Consider your definitions of gauge and absolute pressure.

5. 5.

   A water tank 15 meters high is fully filled. Calculate the absolute pressure at the base if atmospheric pressure is 101.325 kPa and the density of water is 1000 kg/m³.

   Hint

   Consider both hydrostatic pressure and how it combines with atmospheric pressure.

6. 6.

   Explain the significance of understanding gauge pressure for pneumatic systems used in machinery.

   Hint

   Think about the consequences of pressure variations in industrial applications.