1.2) Waves of energy

Question 1

What is a vacuum?

Answer 1

Space

Question 2

Can sound travel through a vacuum? Why or why not?

Answer 2

No, sound cannot travel through a vacuum because there is no free matter and no medium for it to pass through

Question 3

What are the three properties of a wave?

Answer 3

1. Frequency
2. Wavelength
3. Amplitude

Question 4

Can light travel through a vacuum? Why or why not?

Answer 4

Yes, light can travel through a vacuum because it does not require any medium

Question 5

What is frequency?

Answer 5

Frequency is the number of vibrations per second

Question 6

How is frequency measured?

Answer 6

Frequency is measured in hertz (Hz)

Question 7

What is frequency related to?

Answer 7

Frequency is related to the pitch of the sound

Question 8

The higher the frequency the higher the ______.

Answer 8

Pitch. This is because high-frequency waves carry more energy

Question 9

What is wavelength?

Answer 9

Distance between successive peaks

Question 10

How is wavelength measured?

Answer 10

Wavelengths are measured in metres

Question 11

A wave with _______ wavelength carries more energy than a wave with a ______ wavelength

Answer 11

A wave with shorter wavelength carries more energy than a wave with a longer wavelength

Question 12

What is the symbol for wavelength?

Answer 12

Lambda λ

Question 13

What is amplitude related to?

Answer 13

The loudness of sound

Question 14

The _______ the amplitude the louder the sound

Answer 14

The higher the amplitude the louder the sound

Question 15

A wave with a ______ amplitude carries more energy than a wave with a ______ amplitude

Answer 15

A wave with a high amplitude carries more energy than a wave with a low amplitude

Question 16

What is a longitudinal wave?

Answer 16

A longitudinal wave is a mechanical wave where particles vibrate in the same direction as the wave

Question 17

What is an example of a longitudinal wave?

Answer 17

Sound wave, tsunamis, earthquakes

Question 18

What are longitudinal waves made up of?

Answer 18

Longitudinal waves are made up of compressions and rarefactions

Question 19

Where are compressions?

Answer 19

Compressions are where the particles are bunched up or compressed

Question 20

Where are rarefactions?

Answer 20

Rarefactions are where the particles are stretched apart

Question 21

Does sound travel faster through solid, liquid, or air?

Answer 21

Sound travels fastest through solids because the molecules of a solid are closer together and can transmit vibrations (energy) faster

Question 22

What are some examples of transverse waves?

Answer 22

Strings in musical instruments, ocean waves, light

Question 23

Do transverse waves need a medium to move through?

Answer 23

Transverse waves may or may not need a medium to move through

Question 24

At what angle do transverse waves vibrate?

Answer 24

Transverse waves vibrate at right angles to their direction of motion

Question 25

How do the particles vibrate in a transverse wave?

Answer 25

They move up and down

Question 26

Formula to find speed

Answer 26

Wavelength x Frequency
λ x f

Question 27

Formula for frequency

Answer 27

Speed ÷ wavelength
V ÷ λ

Question 28

Formula for wavelength

Answer 28

V ÷ f