8.7.1. Summary of Key Concepts

Try these first

1. 1.

   Define gauge pressure.

   Hint

   Think about how pressure is measured compared to the surrounding atmosphere.

2. 2.

   What does a control volume represent in fluid mechanics?

   Hint

   Consider why you'd want to isolate a specific area.

3. 3.

   What happens to pressure as depth increases in a static fluid?

   • It decreases
   • It remains constant
   • It increases

   Hint

   Think about why deeper water feels heavier.

4. 4.

   True or False: Gauge pressure can be negative.

   • True
   • False

   Hint

   Remember what gauges measure.

5. 5.

   Calculate the gauge pressure at a depth of 5 m in fresh water. The atmospheric pressure is 101 kPa and water density is 1000 kg/m³.

   Hint

   Consider the definition of gauge pressure and the formula involving fluid density and gravity.

6. 6.

   You have a vacuum pressure of -20 kPa. What is the absolute pressure, assuming atmospheric pressure is 101 kPa?

   Hint

   Remember the relationship of absolute pressure with atmospheric and vacuum pressure.