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 in applying Bernoulli's equation, we can analyze the definitions and implications of both types of pressure.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Absolute Pressure (P_a)**: This is the pressure measured with respect to a perfect vacuum. It includes atmospheric pressure.
- **Gauge Pressure (P_g)**: This is the pressure measured relative to atmospheric pressure. It does not include atmospheric pressure.

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