Cp4 Waves

Question 1

What do waves transfer

Answer 1

Energy

Question 2

What do waves do to travel

Answer 2

In order to travel/move waves vibrate

Question 3

What is frequency

Answer 3

Frequency is the number of occurrences of a repeating event per unit of time. Usually the number of complete oscillations per second

Question 4

What does oscilation mean

Answer 4

Oscilation means vibrate

Question 5

What is frequency measured in

Answer 5

Hertz (Hz)

Question 6

What is wavelength

Answer 6

Wavelength is the distance between two successive crests or troughs of a wave. the distance of one entire oscilation

Question 7

What is amplitude

Answer 7

Amplitude is the distance from the equilibrium point of a wave to the crest or trough

Question 8

What is a period

Answer 8

A period is the time required for one complete oscillation

Question 9

What is velocity

Answer 9

Velocity is the speed of something in a given direction.

Question 10

What is a crest

Answer 10

the highest point of a wave

Question 11

what is a trough

Answer 11

the lowest point of a wave

Question 12

What is a longitudinal wave

Answer 12

A wave where the vibrations are parralel to the energy transfer. the vibrations can be compressed or spread out

Question 13

What is a transverse wave

Answer 13

A wave where the the direction of motion of the wave is perpendicular to the direction of motion of the particles. the vibrations can go up or down

Question 14

Whats an example of a longitudinal wave

Answer 14

Sound wave

Question 15

What is an example of an transverse wave

Answer 15

any of the EMF spectrum,an actual wave and others

Question 16

what is the equation for frequency

Answer 16

Frequency = 1 / time of F=1/T

Question 17

What is the equation for Velocity (also known as wave speed in this topic)

Answer 17

Velocity = frequency x wavelength

Question 18

How do you calculate speed

Answer 18

speed = distance/time

Question 19

Describe how you would measure the velocity of air

Answer 19

1. place two microphones,data loggers or people with stopwatches at a set distance apart
2. create a loud sound from one side and see how big the difference is between the times the sound was heard in one area and the other
3. divide the set distance by the differance you have just discovered

Question 20

Describe how you would measure the velocity of waves on surface water

Answer 20

1. get a very big bucket or area of water
2. Splash the water on one side and take a picture as the wave is travelling
3. count how many waves pass a certain point as you splash the water (this is your frequency)
4. measure the distance between two waves in the photo you have taken (this is your wavelength)
   5.Times the wavelength by frequency to calculate speed

Question 21

What is refraction

Answer 21

refraction is the redirection of a wave as it passes from one point/place to another.

Question 22

how does the direction of a wave change as it goes from one material to another

Answer 22

the change in density when the object passes through a material causes a change in speed of the wave.

Question 23

What are the effects of refraction

Answer 23

If the density is higher the speed is slower, if the density is lower the speed is faster

Question 24

What is wave height

Answer 24

The verticle distance from the crest to the trough