Test
Waves - Revision
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (22)
1Waves transfer [blank_start]energy[blank_end] from one place to another. Oscillations in a longitudinal wave are [blank_start]parallel[blank_end] to the direction of energy transfer. Oscillations in a transverse wave are [blank_start]perpendicular[blank_end] to the direction of energy transfer. Sound waves are [blank_start]longitudinal[blank_end], electromagnetic waves are [blank_start]transverse[blank_end] and mechanical waves (e.g. on a slinkly spring) can be either [blank_start]trasnverse[blank_end] or [blank_start]longitduinal[blank_end].
- Aenergy
- Bparallel
- Cperpendicular
- Dlongitudinal
- Etransverse
- Ftransverse
- Glongitudinal
2Fill the blanks:
- Aeak
- Brest
- Crough
- Davelength
- Eavefront
- Fay
3The number of waves that pass in one second is called the wave [blank_start]frequency[blank_end], measured in [blank_start]Hertz[blank_end] ([blank_start]Hz[blank_end]). The amplitude of a wave goes from the [blank_start]center[blank_end] to the [blank_start]top[blank_end], while the wavelength goes from [blank_start]peak[blank_end] to [blank_start]peak[blank_end].
- Afrequency
- BHertz
- CHz
- Dcenter
- Etop
- Fpeak
- Gpeak
4Light of a single frequency is described as [blank_start]monochromatic[blank_end].
- Amonochromatic
5The speed of a wave can be found using the equation: [blank_start]v[blank_end] = [blank_start]f[blank_end] x [blank_start]lambda[blank_end]
v = [blank_start]speed[blank_end] (units: [blank_start]m/s[blank_end])
f = [blank_start]frequency[blank_end] (units: [blank_start]Hz[blank_end])
λ = [blank_start]wavelength[blank_end] (units: [blank_start]m[blank_end])- Av
- Bf
- Clambda
- Dm/s
- EHz
- Fm
- Gspeed
- Hfrequency
- Iwavelength
6A radio station transmits radio waves at a frequency of 2 x 10^5 Hz. The speed of radio waves is 3.0 x 10^8 m/s. Calculate the wavelength of the radio waves.
To answer the question, you must use the formula [blank_start]v[blank_end] = [blank_start]f[blank_end] x [blank_start]lambda[blank_end].
The answer to the question is: [blank_start]1500 m[blank_end]- Av
- Bf
- Clambda
- D1500 m
7The electromagnetic spectrum is a family of waves which can all:
1) Travel at the speed of [blank_start]light[blank_end] (about [blank_start]3 x 10^8 m/s[blank_end])
2) Travel through a [blank_start]vacuum[blank_end] (empty space - no medium required!)
3) Transfer [blank_start]energy[blank_end] from one place to another.- Alight
- B3 x 10^8 m/s
- Cvacuum
- Denergy
8Fill in the blanks:
- Awavelength
- Bfrequency
- Cmicrowave
- Dinfra-red
- Eultraviolet
- Fx-ray
- Ggamma
9The higher the frequency (the [blank_start]smaller[blank_end] the wavelength) of electromagnetic radiation, the more [blank_start]energy[blank_end] it transfers.
This is why [blank_start]gamma[blank_end] rays (from radioactive material), x-rays (used in [blank_start]hospitals[blank_end]), and [blank_start]ultraviolet[blank_end] radiation (from the sun) can be harmful to living tissue.- Asmaller
- Benergy
- Cgamma
- Dhospitals
- Eultraviolet
10State the safety issues regarding the use of microwaves and x-rays:
Microwaves: can [blank_start]heat[blank_end] up body [blank_start]tissue[blank_end], damage [blank_start]living[blank_end] [blank_start]cells[blank_end]
X-Rays: can cause [blank_start]ionization[blank_end], kill [blank_start]living[blank_end] [blank_start]cells[blank_end], cause [blank_start]cancerous[blank_end] changes- Aheat
- Btissue
- Cliving
- Dcells
- Eionization
- Fliving
- Gcells
- Hcancerous
11[blank_start]Microwave[blank_end] radiation and [blank_start]radio[blank_end] waves are able to penetrate your skin. Their energy can be [blank_start]absorbed[blank_end] by body tissue, which can [blank_start]heat[blank_end] internal organs and may damage them. [blank_start]Infra-red[blank_end] radiation from the sun is absorbed by your [blank_start]skin[blank_end]. Too much of this can cause [blank_start]burns[blank_end].
- AMicrowave
- Bradio
- Cabsorbed
- Dheat
- EInfra-red
- Fskin
- Gburns
12Fill in the blanks:
- Aontinuous
- B10^-15
- Cgamma
- D10^4
- Eradio
13Describe the uses of these electromagnetic waves:
Radio Waves: r[blank_start]adio[blank_end] [blank_start]communication[blank_end]
Microwaves: s[blank_start]atellite[blank_end] [blank_start]communication[blank_end], m[blank_start]obile[blank_end] [blank_start]phone[blank_end] [blank_start]networks[blank_end], h[blank_start]eating[blank_end]
Infra-red: r[blank_start]emote[blank_end] [blank_start]controls[blank_end], i[blank_start]ntruder[blank_end] [blank_start]alarms[blank_end], o[blank_start]ptical[blank_end] [blank_start]fibre[blank_end], r[blank_start]adiant[blank_end] [blank_start]heating[blank_end]
X-Rays: m[blank_start]edicine[blank_end], a[blank_start]irport[blank_end] [blank_start]security[blank_end]- Acommunication
- Batellite
- Ccommunication
- Dobile
- Ephone
- Fnetworks
- Geating
- Hadio
- Iemote
- Jcontrols
- Kntruder
- Lalarms
- Mptical
- Nfibre
- Oadiant
- Pheating
- Qedicine
- Rirport
- Ssecurity
14If a wave source (such as [blank_start]light[blank_end] from a distant galaxy, or [blank_start]sound[blank_end] from a passing ambulance) moves away from an observer, the observed wavelength [blank_start]increases[blank_end] and the frequency [blank_start]decreases[blank_end]. This is known as the [blank_start]Doppler[blank_end] effect.
If the wave source moves towards the observer, the complete [blank_start]opposite[blank_end] happens. The wavelength [blank_start]decreases[blank_end], while the frequency [blank_start]increases[blank_end].- Alight
- Bsound
- Cincreases
- Ddecreases
- EDoppler
- Fopposite
- Gdecreases
- Hincreases
15There is an observable increase in the [blank_start]wavelength[blank_end] of light from most [blank_start]distant[blank_end] galaxies. The further away the galaxies are, the [blank_start]greater[blank_end] the observed increase in [blank_start]wavelength[blank_end], and so the [blank_start]faster[blank_end] they are moving away from us. This effect is called [blank_start]red shift[blank_end] because the wavelengths are stretched towards the red end of the spectrum.
- Awavelength
- Bnearby
- Cdistant
- Dslower
- Efaster
- Ftowards
- Gaway from
- Hgreater
- Ismaller
- Jred-shift
- Kblue-shift
- Lfrequency
- Mdistant
- Nnearby
- Oslower
- Pfaster
- Qtowards
- Raway from
- Sgreater
- Tsmaller
- Ured-shift
- Vblue-shift
- Wwavelength
- Xfrequency
- Ygreater
- Zwavelength
- AAwavelength
- ABnearby
- ACfaster
- ADslower
- AEred-shift
- AFblue-shift
- AGnearby
- AHdistant
- AIslower
- AJfaster
- AKtowards
- ALaway from
- AMsmaller
- ANred-shift
- AOblue-shift
- APfrequency
- AQdistant
- ARslower
- ASfaster
- ATtowards
- AUaway from
- AVgreater
- AWsmaller
- AXred-shift
- AYblue-shift
- AZfrequency
- BAnearby
- BBdistant
- BCtowards
- BDaway from
- BEgreater
- BFsmaller
- BGred-shift
- BHblue-shift
- BIwavelength
- BJfrequency
- BKnearby
- BLdistant
- BMslower
- BNfaster
- BOtowards
- BPaway from
- BQgreater
- BRsmaller
- BSwavelength
- BTfrequency
16Name four types of mechanical waves:
w[blank_start]ater[blank_end] [blank_start]wave[blank_end]
[blank_start]waves[blank_end] on a s[blank_start]pring[blank_end]
s[blank_start]ound[blank_end] [blank_start]wave[blank_end]
e[blank_start]arthquake[blank_end] [blank_start]wave[blank_end]
w[blank_start]ater[blank_end] [blank_start]waves[blank_end] are t[blank_start]ransverse[blank_end]
[blank_start]waves[blank_end] on a s[blank_start]pring[blank_end] can be l[blank_start]ongitudinal[blank_end] or t[blank_start]ransverse[blank_end]
s[blank_start]ound[blank_end] [blank_start]waves[blank_end] are l[blank_start]ongitudinal[blank_end]
e[blank_start]arthquake[blank_end] [blank_start]waves[blank_end] can be l[blank_start]ongitudinal[blank_end] (p[blank_start]ressure[blank_end] wave) or t[blank_start]ransverse[blank_end] (e[blank_start]arth[blank_end] wave)- Aater
- Bwave
- Cpring
- Dwaves
- Eound
- Fwave
- Garthquake
- Hwave
- Iater
- Jwaves
- Kransverse
- Lwaves
- Mpring
- Nongitudinal
- Oransverse
- Pound
- Qwaves
- Rongitudinal
- Sarthquake
- Twaves
- Uongitudinal
- Vressure
- Wransverse
- Xarth
17Fill in the blanks:
- Asound
- Bcompressions
- Crarefactions
- Dlower
- Ecompression
- Frarefaction
18Sound is caused by [blank_start]vibrations[blank_end] which make pressure waves move through a substance (such as air).
In a sound wave, particles oscillate [blank_start]parallel[blank_end] to the direction of the wave motion.
A sound wave is therefore a type of [blank_start]longitudinal[blank_end] wave.- Avibrations
- Bparallel
- Clongitudinal
19The hearing frequency of an average human is [blank_start]20[blank_end]Hz - [blank_start]20kHz[blank_end].
- A20
- B20kHz
20In a sound wave:
Pitch depends on the wave's [blank_start]frequency[blank_end].
Loudness depends on the wave's [blank_start]amplitude[blank_end].
Echoes are caused when the wave [blank_start]reflects[blank_end] off an object.- Afrequency
- Bamplitude
- Creflects
21Sound waves need a [blank_start]medium[blank_end] (a material) to travel through (they cannot travel through a [blank_start]vacuum[blank_end]).
Describe a simple experiment to determine the speed of sound in air:
• Stand 100m away from a brick [blank_start]wall[blank_end]
• [blank_start]Clap[blank_end] your hands
• Use a [blank_start]stopwatch[blank_end] to measure the time taken between you clapping your hands and the [blank_start]echo[blank_end] returning to you
• [blank_start]Retake[blank_end] the experiment at least [blank_start]3[blank_end] times
• Use the formula [blank_start]s[blank_end] = [blank_start]d[blank_end]/[blank_start]t[blank_end] to calculate the [blank_start]average[blank_end] [blank_start]speed[blank_end]- Amedium
- Bvacuum
- Cwall
- DClap
- Estopwatch
- Fecho
- GRetake
- H3
- Is
- Jd
- Kt
- Laverage
- Mspeed
22What are some typical values of the speed of sound in:
Gases: [blank_start]330[blank_end] m/s
Liquids: [blank_start]1500[blank_end] m/s
Solids: [blank_start]5200[blank_end] m/s- A330
- B1500
- C5200
Información
- Descripción
- Test sobre Waves - Revision, creado por Seth-Riley Adams el 13/03/2018.
- Autor
- Seth-Riley Adams
- Idioma
- English
- Visitas
- 79
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test