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waves Flashcards

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1
Q

Fastest to slowest speed of sound?

A

Solid, Liquid, gas

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2
Q

Clap echo method

A

Stand around 50m away from a wall and clap sharply, and time how long it takes for you to clap 11 times.

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3
Q

What is ultrasound?

A

ultrasound is a sound higher than we can hear.

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4
Q

What is our frequency hearing range?

A

20Hz-20,000Hz

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5
Q

At what angle does the light come outside the other block?

A

The same as the entrance angle.

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6
Q

When does refraction occur?

A

Refraction occurs when light travels from one material to another?

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7
Q

What happens to light as it enters a new material. e.g. Glass

A

Slows down
Frequency stays the same
Wavelength decreases

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8
Q

Hertz equation

A

f=1/T

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9
Q

Wavelength equation

A

f=V/(wavelength)

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10
Q

Where is the epicenter?

A

Directly above the Earths surface.

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11
Q

What is the focus?

A

Where the seismic waves are emitted.

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12
Q

What is the study of earthquakes called?

A

semiology

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13
Q

What is a seismic wave?

A

The energy transferred makes a shock that travels through the earth and across its surface as a wave.

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14
Q

What are the 3 types of seismic waves?

A

primary waves
secondary waves
Long waves

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15
Q

When do long waves arrive?

A

Last

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16
Q

Are long waves violent?

A

They are very violent and have a up and down movement.

17
Q

What do you use to measure the seismic waves?

A

Seismometer

18
Q

What waves travel through the mantel?

A

P-waves
S-waves

19
Q

What are the layers of the earth?

A

Crust
Mantel
Outer core
Inner core

20
Q

What happens to P and S waves as they travel through the mantel?

A

They bend

21
Q

What waves refract at the boundary between the mantel and the outer core?

A

p-waves

22
Q

Why is there a shadow zone?

A

the existence of the shadow zone shows there is a liquid outer core under the mantel.

23
Q

What type of wave is a P-wave?

A

Longitudinal

24
Q

What type of wave is a S-wave?

A

transverse

25
Q

What type of wave is a sound wave?

A

Longitudinal

26
Q

What type of wave is a light wave?

A

transverse

27
Q

Where is the trough in a wave?

A

At the low point of the wave

28
Q

Where is the peak/crest in a wave?

A

At the high point of the wave

29
Q

What is the amplitude?

A

The height and energy of the wave.

30
Q

What direction do the particles move in relativity to the direction of a transverse wave?

A

Parallel

31
Q

What direction do the particles move in relativity to the direction of a longitudinal wave?

A

At a 90 degree angle

32
Q

What is the speed of sound in air?

A

340m/s

33
Q

What is the speed of sound in liquid?

A

1500m/s

34
Q

At what angle will a reflection be?

A

The same as the origin light

physics waves (1 decks)

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