Physics waves. Getting ready for exams. Stuck on this question for a bit now ple

Question

Physics waves. Getting ready for exams. Stuck on this question for a bit now please help.

Two long coil springs A and B of equal length and mass but with different spring constants K_A and K_B are connected and stretched It is found that the length of A is doubled and the length of B tripled A wave is incident on the junction AB from the spring A (a) Applying the Hooke's law, find the ratio (b) Find the ratio Z_A/Z_B of the characteristic impedances (c) Find the reflection coefficient for the wave amplitude (d) Find the transition coefficient for the wave amplitude

Explanation / Answer

a. As the second spring(B) much streached so its spring is less than the first (A). So K_A/K_B = (3/2)

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