Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli's equation. Explain.

Explanation

To determine whether it matters if one uses gauge pressure instead of absolute pressure when applying Bernoulli's equation, we can follow these steps:

### Step 1: Understand the Definitions
- **Gauge Pressure (Pg)**: This is the pressure measured relative to atmospheric pressure. It does not include the atmospheric pressure in its value.
- **Absolute Pressure (Pa)**: This is the total pressure measured relative to a perfect vacuum. It includes atmospheric pressure.

### Step 2: Relationship Between Gauge and Absolute Pressure
- The relationship between gauge pressure and absolute pressure can be expressed as:
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