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physics > chapter 12 > Flashcards

chapter 12 Flashcards

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1
Q

What the 2 differnt ways waves can move called

A

transverse and longitudinal

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2
Q

What is the differnce between the 2 different types of waves

A

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

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3
Q

Whats the definition of amplitude

A

the maxium displacement of the wave from its undisturbed position

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4
Q

whats the defonition of wave length

A

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

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5
Q

whast the defonition of frequency

A

the number of waves passing past a fixed point per second

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6
Q

whats the equation for freuency

A

time=1/frequency

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7
Q

whats the equation for wave speed

A

wavespeed=frequency*wavelength

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8
Q

whats the defonition of a wave

A

the transfer of energy from one point to another

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9
Q

Whats a mechanical wave

A

a wave that vibrated through a medium

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10
Q

whats a electrostatic wave

A

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

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11
Q

what are sound waves

A

vibrations that travel through a medium

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12
Q

Why cant sound travel in a vacuum

A

sound needs particles to travel

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13
Q

how do we hear sound

A

sound waves vibrate the ear drum

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14
Q

what is the frequency range humans can hear

A

20hz-20khz

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15
Q

what does refaction do to the wave

A

change its direction

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16
Q

what 3 things happen to light when it hits a boundry

A

reflected,transmitetd and absorbed

17
Q

what are some uses of ultra sound

A

pre natal scanning and cleanign jewlerary

18
Q

what 3 things happen when sound hits a boundry

A

reflect absorbed and transmitted(pass through)

19
Q

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

A

divide by 2

20
Q

whats an x rays main disadvantage

A

ionising radiaition

21
Q

how are seismic waved produced

A

in an earthquake

22
Q

whats the epicentre

A

the nearest point on the surface to where the earthquake orginates

23
Q

what type of wave is a P-wave

A

longitudinal

24
Q

what type of wave is a S-wave

A

transverse

physics (18 decks)

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