P14 Mechanical waves Flashcards

1
Q

What is a transverse wave?

A

Oscillations are perpendicular to the direction of energy transfer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a longitudinal wave?

A

Oscillations are parallel to the direction of energy transfer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Amplitude

A

Maximum displacement of a point on a wage from its undisturbed position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Unit for amplitude

A

meteres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Frequency

A

Number of waves passing a fixed point per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Unit for frequency

A

Hertz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Period

A

Time taken for one complete wave to pass a fixed point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Unit for a peroid

A

Seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Wavelength

A

Distance from one point on a wave to the equivalent point on the next wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Unit for wavelength

A

Meteres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Wave speed

A

Distance travelled by each wave per second, and the speed at which energy is transferred by the wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Unit for wavespeed

A

meters per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Example of a transverse wave

A

Electromagnetic waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Example of a longitudinal wave

A

Sound waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Wave speed equation

A

Wave speed(m/s) = frequency(Hz) X wavelength(M)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How are frequency and period related in equation?

A

Period = 1 / Frequency

17
Q

What is a compression?

A

Area in a longitudinal wave where the particles are squashed close together

18
Q

What is rarefaction?

A

Area in a longitudinal wave where particles are pulled apart

19
Q

What property of a wave stays the same when it travels from one medium to another?

20
Q

What rule do waves follow when they reflect off a surface/

A

Angle of incidence = angle of reflection

21
Q

What happens when waves are transmitted at a boundary between two substances?

A

They carry on moving at a different speed

22
Q

What happens when waves are absorbed by a substance?

A

Energy of the wave is transferred to energy stores of the substance

23
Q

Absorption (waves)

A

The energy of the waves in transferred to energy stores of the substance they travel in to

e.g when food is heated in a microwave

24
Q

Reflection

A

The waves bounce back

25
Refraction
The waves change speed and direction as they cross the boundary
26
Transmission
The waves carry on moving once they have crossed the boundary, but may be refracted