Question

1. which is an example of the transfer of energy by a longitudinal wave? *

a large ocean wave knocks a person down.
a guitar string vibrates after being plucked.
s-waves cause the ground to move up and down during an earthquake.
a door slams, and someone in the next room hears the sound.

Explanation:

1. Analyze Option A: Ocean waves are transverse (and also have some longitudinal components, but the main motion of water in ocean waves is transverse - up - down/back - forth in a circular motion, but the wave we see moving is mostly transverse for the surface wave. So this is not a pure longitudinal wave energy transfer example.
2. Analyze Option B: A guitar string vibration is a transverse wave (the string moves perpendicular to the direction of wave propagation along the string), so this is a transverse wave, not longitudinal.
3. Analyze Option C: S - waves (secondary waves) in earthquakes are transverse waves (they move the ground perpendicular to the wave's direction), so this is a transverse wave example.
4. Analyze Option D: Sound waves are longitudinal waves. When a door slams, it creates sound waves (longitudinal waves) that travel through the air (compressions and rarefactions in the direction of wave propagation) and transfer energy to the ear of the person in the next room, allowing them to hear the sound.

Answer:

D. A door slams, and someone in the next room hears the sound