Science waves

Question 1

Explain how particles (in a medium) transfer energy

Answer 1

In case of a wave moving through a medium, particles oscillate at their mean positions to transfer energy.

Question 1

Reflection

Answer 1

The wave is sent off in a new direction

Question 2

Absorption

Answer 2

The wave is converted to thermal energy

Question 3

Transmission

Answer 3

The wave passes through the object

Question 4

Mechanical wave

Answer 4

Requires a medium to travel

Question 5

Electromagnetic

Answer 5

Can travel through empty space

Question 6

Transverse

Answer 6

Moves the medium (particles) at a right angle to the direction in which the wave travels.
Crest: The highest part of the wave
Trough: The lowest part of the wave

Question 7

Longitudinal

Answer 7

Moves the medium (particles) parallel to the direction in which the wave travels.
Compression: The location where particles are closest together
Refraction: The location where particles are farthest apart

Question 8

Surface

Answer 8

A combination of transverse and longitudinal waves.

Energy travels along the medium’s surface

Question 9

Amplitude

Answer 9

Amplitude: The maximum distance that the particles are carried from their rest positions

Question 10

Wavelenght

Answer 10

Wavelength: The distance between two corresponding parts of a wave

Question 11

Frequency

Answer 11

Frequency: The number of complete waves that pass a given point in a certain amount of time

Question 12

Relationship between wavelength, frequency and amplitude.

Answer 12

If we have a long wavelength, we can have a weak amplitude or a small amplitude, it does not matter. The wavelength of a wave is related more to its frequency and period, that is, how often a wave changes between its peaks and dips. The amplitude of the wave is more related to its intensity.

Question 13

Relationship between w and a

Answer 13

There is NO relationship between wavelength and amplitude. If we have a long wavelength, we can have a weak amplitude or a small amplitude, it does not matter. The wavelength of a wave is related more to its frequency and period, that is, how often a wave changes between its peaks and dips.

Question 14

Relationship between f and a

Answer 14

The relationship between the wave’s amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases. The amplitude increases as the frequency decreases.

Question 15

Relationship between f and w

Answer 15

The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Question 16

equation for wave speed

Answer 16

v = f λ

Question 17

equation for frequency

Answer 17

f = v/λ

Question 18

equation for wavelength

Answer 18

λ = v/f

Question 19

units for wavelength

Answer 19

meters

Question 20

units for frequency

Answer 20

Herz

Question 21

units for wave speed

Answer 21

minutes/seconds

Question 22

magnetic force

Answer 22

The force that exists between two magnets, caused by the motion of charges.

Question 23

Magnetic field

Answer 23

The area around a magnet where it can push or pull other magnets.

Question 24

electric force

Answer 24

The force that exists between two charges, caused by interaction.

Question 25

static electricity

Answer 25

The buildup of electric charges on objects.

Question 26

electromagnetic force

Answer 26

An interaction that occurs between electrically charged particles.

Question 27

universal forces

Answer 27

Universal Forces

1. Gravitational
2. Electromagnetism
3. Weak nuclear force
4. Strong nuclear force

Question 28

generating light

Answer 28

When an electron interacts with a proton, the electromagnetic force adds energy to the electron (generating a photon)

Question 29

waves

Answer 29

Disturbances that transfer energy from place to place.

Question 30

medium

Answer 30

The material through which a wave travels. (solid, liquid, gas)

Question 31

Examples for transverse waves:

Answer 31

1. Visible light
2. Radio wave
3. X-Ray

Question 32

Examples of longitudinal waves:

Answer 32

1. Sound wave
2. Ultrasound wave
3. Slinky wave

Question 33

Examples of surface waves:

Answer 33

1. Ocean wave
2. Ripples in water
3. Earthquake wave

Question 34

what are wave properties?

Answer 34

Wave properties are amplitude, wavelength and frequency.

Question 35

why are polar lights that colour

Answer 35

The two primary gases in the Earth’s atmosphere are nitrogen and oxygen, and these elements give off different colours during an aurora display. The green we see in the aurora is characteristic of oxygen, while hints of purple, blue or pink are caused by nitrogen.