Questions On Longitudinal Waves

Question 1

Longitudinal waves

Answer 1

A series of disturbances of particles in a medium where the displacement is parallel to the equilibrium position

Question 2

Example of longitudinal waves

Answer 2

Sound waves

Question 3

How are sound waves produced?

Answer 3

Vibrations in a medium. SOUND WAVES CANT EXIST IN A VACUUM, THEY NEED A MEDIUM

Question 4

In what medium does sound waves travel the fastest?

Answer 4

1)Solids-fastest e.g copper wires, optical fibres
2)Liquids- average speed e.g water
3) gas - slowest e.g air

Question 5

Ultrasound

Answer 5

Sound waves w a higher frequency than 20kHz ( 20 000Hz) but less than 100kHz
Can’t be heard by human ears

Question 6

In what temperature of gas does sound move faster and why?

Answer 6

Sound moves faster in hot air than cold air bc the particles are closer and vibrating faster

Question 7

What makes a complete wave?

Answer 7

A compression and rarefaction

Question 8

What impacts pitch?

Answer 8

Frequency
Many waves = Higher frequency = Higher pitch

Question 9

What impacts loudness?

Answer 9

Amplitude
High amplitude = more loudness

Question 10

What is good sound quality?

Answer 10

Fewer mixed frequencies

Question 11

What is bad sound quality?

Answer 11

Noise
Many mixed frequencies
( bad sound quality means the tone is bad )

Question 12

What is the term for sound quality?

Answer 12

Tone

Question 13

What is an echo ?

Answer 13

Reflection on sound

Question 14

Why does sound travel faster in a certain medium?

Answer 14

The particles are closely packed.