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.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.