A certain sound source is increased in sound level by 40.0 dB. By what multiple is (a) its intensity increased and (b) its pressure amplitude increased?

Explanation

To solve the problem, we need to determine how the intensity and pressure amplitude of a sound source change when the sound level is increased by 40.0 dB.

### Step-by-Step Solution:

#### Part (a): Increase in Intensity

1. **Understand the relationship between sound level and intensity:**
The sound level in decibels (dB) is given by the formula:
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