The equations for two sinusoidal waves propagating through a string are given by, `y_(1)=4 sin (20x-30t)`
`y_(2)=4 sin (25-x-40t)`
where y and x are in centimeters and t is second.
(i) What is the phase difference between these two waves at the points x=5.0 cm and at t=2.0 s?
(ii) When these two waves interface what is the maximum and minimum value of the intensity?

Explanation

To solve the given problem, we will break it down into two parts as per the question.

### Part (i): Finding the Phase Difference

1. **Identify the wave equations**:
- Wave 1: \( y_1 = 4 \sin(20x - 30t) \)
- Wave 2: \( y_2 = 4 \sin(25x - 40t) \)

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