Sound Unit 17 Flashcards
Which of the following describes a transfer of energy from the guitar to the musicians ear while the sound is being produced? (e.g. how does sound go from a source to your ear)
B) Any sound can cause the air in the room to vibrate, and these vibrations transfer energy from the guitar to the ear.
What happens to the matter that makes up a liquid when sound travels through it?
B) As sound travels through liquid the matter is displaced for a period of time but then returns to its original position after the sound passes
Do you gain energy when sound is transferred to your ear?
C) Yes; even though the persons ear won’t feel any different while listening to music, sound does transfer a small amount of energy to the ear which makes it vibrate.
What happens to the energy of the sound after a drummer hits it but doesn’t hit it again?
C) The energy of the drum decreases because the sound transfers energy away from the drum.
Which of the following correctly describes how energy is transferred as sound moves through air?
A) As sound moves through air, molecules that make up air vibrate and collide with each other. As the molecules collide, energy is transferred from one molecule to the next.
How does sound transfer energy through matter?
B) Sound transfers energy through matter as the molecules that make up the matter collide with one another.
In outer space, there’s no air, only empty space between the stars and planets. Can energy be transferred by light and sound in outer space? Why?
B) Energy can be transferred by light in outer space because light can travel without air carrying it but energy cannot be transferred by sound because sound requires a medium such as air to carry it.
A repairman uses a tuning fork, like the one shown below, to tune a piano. He hits the tuning fork against the edge of a table. The tuning fork begins to vibrate. The vibrating tuning fork makes a specific sound, and the repairman adjusts the piano until it makes the same sound when played. After a while, the tuning fork stops vibrating, and the sound stops. What happens to the energy of the tuning fork as the vibrations of the tuning fork slow down and eventually stop?
B) Some of the energy is transferred to the surrounding air
What can sound waves not carry energy through?
D) A vacuum
Sound reaches our ears because sound makes air particles:
D) Vibrate
Which of the following forms of energy can travel by vibrating particles of air?
D) Sound
When a student listens to music, sound waves from the speaker are received by her ear. Which of the following is a physical description of this process?
B) Energy is transferred by the sound waves from the speaker to the students ear
The amplitude of a sound wave corresponds to the volume of the sound. The greater the amplitude, the louder the sound. Based on this information, which two waves from the above graphs have the loudest sound?
D) Waves 3&4
What factor determines the pitch of a sound wave?
B) Frequency
This illustration shows three different waves traveling through the same medium. How does the waves differ from one another?
C) The waves carry different amounts of energy
