8.4.1. Pressure Calculation via Weight of Fluid Balls

Try these first

1. 1.

   Define gauge pressure.

   Hint

   Consider what baseline pressure gauge measures against.

2. 2.

   What happens to pressure in a fluid at rest when you go deeper?

   Hint

   Think about what is above you in the fluid.

3. 3.

   What is the equation for pressure based on fluid weight?

   • P = F/A
   • P = ρgh
   • P = μA

   Hint

   Think about force exerted by gravity on a fluid column.

4. 4.

   True or False: Shear stress exists in fluids at rest.

   • True
   • False

   Hint

   Recall the conditions of static fluids.

5. 5.

   If a fluid weighs 12 kN/m^3 and has a depth of 20 meters, what is the pressure at the base?

   Hint

   Consider using the weight of the fluid multiplied by its height.

6. 6.

   A pressurized water tank has a gauge pressure of 350 kPa. Calculate the absolute pressure assuming atmospheric pressure is 101.3 kPa.

   Hint

   Remember to add atmospheric pressure to the gauge pressure.