Video #1

How does a speaker produce sound?

• By vibrating its magnet.

• By moving its diaphragm rapidly back and forth.

• By generating electrical signals.

• By heating the air in front of it.

What does the term "oscillation" refer to in physics?

• A continuous forward movement.

• A rapid spinning motion.

• Movement back and forth.

• A sudden, singular displacement.

Are you enjoying the video lesson?

• Yes

• No

What is the defining characteristic of a wave?

• It always travels through a vacuum.

• It transports the medium itself across a distance.

• It transports energy through a medium without transporting the medium itself.

• It only travels through air.

Why does a person's voice sound different on an audio recording compared to how they hear themselves speak?

• Audio recordings distort the sound waves.

• Recordings only capture the sound traveling through the air, not through flesh and bone.

• The microphone changes the pitch of the voice.

• The speaker's ear drum vibrates differently when listening to a recording.