1. Distinguish between constructive and destructive interference. Please use 3 content related

sentences. ref: p.394-399)

Constructive interference is when a crest interferes a crest or trough interferes a trough, it results in a larger crest or trough while

Destructive interference is when a crest interferes a trough or a crest interferes a trough, it results in cancellation and it produces a smaller disturbance

In constructive interference the displacement of the waves interfere in same directions. While

In destructive interference the displacement of the waves interfere in opposite directions

In constructive interference the amplitude of the resultant waves at a given position or time is greater than that of either individual waves. While

In destructive interference the amplitude of the resultant waves is less than that of either individual waves.

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s