chapter 12

Question 1

What the 2 differnt ways waves can move called

Answer 1

transverse and longitudinal

Question 2

What is the differnce between the 2 different types of waves

Answer 2

a longitudinal waves vibrations move paralel to the direction of wave travel. In transverse waves the vibrations are at a right angle to the direction of travel

Question 3

Whats the definition of amplitude

Answer 3

the maxium displacement of the wave from its undisturbed position

Question 4

whats the defonition of wave length

Answer 4

the distance from a point on the wave to the equivalent point on the adjacent wave

Question 5

whast the defonition of frequency

Answer 5

the number of waves passing past a fixed point per second

Question 6

whats the equation for freuency

Answer 6

time=1/frequency

Question 7

whats the equation for wave speed

Answer 7

wavespeed=frequency*wavelength

Question 8

whats the defonition of a wave

Answer 8

the transfer of energy from one point to another

Question 9

Whats a mechanical wave

Answer 9

a wave that vibrated through a medium

Question 10

whats a electrostatic wave

Answer 10

waves that can travel through a vacuum (no medium is needed)

Question 11

what are sound waves

Answer 11

vibrations that travel through a medium

Question 12

Why cant sound travel in a vacuum

Answer 12

sound needs particles to travel

Question 13

how do we hear sound

Answer 13

sound waves vibrate the ear drum

Question 14

what is the frequency range humans can hear

Answer 14

20hz-20khz

Question 15

what does refaction do to the wave

Answer 15

change its direction

Question 16

what 3 things happen to light when it hits a boundry

Answer 16

reflected,transmitetd and absorbed

Question 17

what are some uses of ultra sound

Answer 17

pre natal scanning and cleanign jewlerary

Question 18

what 3 things happen when sound hits a boundry

Answer 18

reflect absorbed and transmitted(pass through)

Question 19

when workign out an echo what do you need to remember to do

Answer 19

divide by 2

Question 20

whats an x rays main disadvantage

Answer 20

ionising radiaition

Question 21

how are seismic waved produced

Answer 21

in an earthquake

Question 22

whats the epicentre

Answer 22

the nearest point on the surface to where the earthquake orginates

Question 23

what type of wave is a P-wave

Answer 23

longitudinal

Question 24

what type of wave is a S-wave

Answer 24

transverse