2543919
Descripción
Test por I M Wilson, actualizado hace más de 1 año
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Creado por I M Wilson
hace alrededor de 9 años
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Pregunta 1
Pregunta
What does mechanical mean in terms of waves?
Respuesta
-
Requires a substance to travel e.g. air particles
-
Produced by a machine
Pregunta 2
Pregunta
Waves can be...
Respuesta
-
Reflected, refracted and diffracted
-
Reflected, diffused and compressed
-
Diffracted, reacted, and rarefacted
-
Bent, Bounced and Spread out
Pregunta 3
Pregunta
What type of EM wave is used to see broken bones?
Respuesta
-
X-rays
-
Visible
-
UV rays
Pregunta 4
Pregunta
When light hits a shiny planar surface the path of light leaving the surface is called the...
Respuesta
-
reflected ray
-
incident ray
-
virtual image
Pregunta 5
Pregunta
Heat can be transferred as what kind of light?
Respuesta
-
Infra-red
-
Microwave
Pregunta 6
Pregunta
Which type of EM wave can be used for communication on an FM or AM frequency?
Respuesta
-
radiowaves
-
infra-red
-
microwaves
-
bluetooth
Pregunta 7
Pregunta
The process where hot particles rise, and cool particles sink is called what?
Respuesta
-
Convection
-
Conduction
-
Radiation
Pregunta 8
Pregunta
What is conduction?
Respuesta
-
The transfer of energy through a solid substance
-
The way an orchestra is led
-
The transfer of electricity through a wire
Pregunta 9
Pregunta
Which of these is not included in Newton's colour wheel?
Respuesta
-
Pink
-
Orange
-
Red
-
Blue
Pregunta 10
Pregunta
Coal and oil are the only fossil fuels used for electricity.
Respuesta
- True
- False
Pregunta 11
Pregunta
Convection is the transfer of heat through a fluid
Respuesta
- True
- False
Pregunta 12
Pregunta
What three ways can heat be transferred?
Respuesta
-
Radiation
-
Convection
-
Conduction
-
Evporation
-
Titration
-
Distillation
Pregunta 13
Respuesta
-
Reflection
-
Refraction
-
Diffraction
Pregunta 14
Pregunta
What is unsustainable energy?
Respuesta
-
Very inefficient energy.
-
An energy source that will run out.
-
An energy source that doesn't last very long.
-
When too much energy is used.
Pregunta 15
Pregunta
What is the unit of measuring frequency?
Respuesta
-
Hertz
-
Hurts
-
Amps
-
Voltz
-
Volts
-
Newtons
-
Decibels
Pregunta 16
Pregunta
When a spring is stretched out, gravitational potential energy is stored in the coils.
Respuesta
- True
- False
Pregunta 17
Pregunta
What are the two types of diagrams used when describing energy in an appliance?
Respuesta
-
Sankey
-
Energy transfer
-
Efficiency
-
Power rating
Pregunta 18
Pregunta
What types of surfaces are the best emitters of radiation?
Respuesta
-
Black
-
White
-
Shiny
-
Matte
Pregunta 19
Pregunta
Why are metals good electrical conductors?
Respuesta
-
Because they are solids.
-
Because they have free electrons.
-
Because they have free ions.
-
Because they are dense.
Pregunta 20
Pregunta
Gamma rays have a wavelength between 10^-12 and 10^-15 m.
Respuesta
- True
- False
Pregunta 21
Pregunta
What surfaces absorb each better?
Respuesta
-
Black
-
Matte
-
White
-
Shiny
Pregunta 22
Pregunta
What surfaces reflect heat better?
Respuesta
-
White
-
Shiny
-
Black
-
Matte
Pregunta 23
Pregunta
What are the three standard states of matter?
Respuesta
-
Solid
-
Liquid
-
Gas
-
Plasma
-
Fluid
-
Metal
-
Non-metal
Pregunta 24
Pregunta
What unit do we use to measure force?
Respuesta
-
N
-
N/kg
-
kg
Pregunta 25
Pregunta
Wavespeed=
Respuesta
-
Hz x m
-
Hz / m
-
m / Hz
-
m x s
-
m / s
Pregunta 26
Pregunta
How many volts are in the mains supply in the UK?
Respuesta
-
230V
-
240V
-
220V
-
250V
Pregunta 27
Pregunta
How do you calculate the energy required to heat up a substance?
Respuesta
-
E = m c θ
-
E= (m c) / θ
-
E = m / (c θ)
Pregunta 28
Pregunta
What colour is the back of a solar panel and why?
Respuesta
-
Black, because it absorbs heat.
-
Black, because it emits heat.
-
Shiny silver, because it reflects the heat back in.
-
Copper, because copper is a good conductor of heat.
Pregunta 29
Pregunta
Surfaces that are matte appear shiny when light is shone on them.
Respuesta
- True
- False
Pregunta 30
Pregunta
Sound travels in longitudinal waves.
Respuesta
- True
- False
Pregunta 31
Pregunta
A radio transmitter can send a strong signal through a hill.
Respuesta
- True
- False
Pregunta 32
Pregunta
Diffraction is...
Respuesta
-
when waves pass through a gap and spread out.
-
when waves pass through a gap and change direction.
-
when waves meet a gap and are reflected back instead of passing through.
Pregunta 33
Pregunta
What is evaporation?
Respuesta
-
The process of a liquid becoming a gas.
-
The process of a solid turning straight into a gas (missing out the liquid phase).
-
When a gas becomes a liquid.
Pregunta 34
Pregunta
Which of these is the right wavelength for a radio wave?
Respuesta
-
1m
-
0.0001m
Pregunta 35
Pregunta
The best conductors are...
Respuesta
-
dense solid substances.
-
solid metals.
-
most metals and some solutions.
Pregunta 36
Pregunta
A solar eclipse happens when...
Respuesta
-
the Earth passes between the Sun and the Moon.
-
the Moon passes between the Sun and the Earth
-
the Sun passes between the Moon and the Earth
Pregunta 37
Pregunta
The relationship between wavelength and frequency is...
Respuesta
-
Directly proportional
-
Inversely proportional
Pregunta 38
Pregunta
What is payback time?
Respuesta
-
The amount of time needed to earn back the cost of an object from how much it saves per year.
-
The amount of time that an energy saving installation is effective for.
-
The amount of time a power station needs to run for to meet the demand of the National Grid.
Pregunta 39
Pregunta
There are 7 colours on Newton's colour wheel.
Respuesta
- True
- False
Pregunta 40
Pregunta
A new door costs £200. It saves £25 on heating bills every year. How long is the pay back time?
Respuesta
-
8 years
-
4 years
-
10 years
Pregunta 41
Pregunta
A Sankey diagram shows you the most wasteful appliance in a household.
Respuesta
- True
- False
Pregunta 42
Pregunta
The transfer of heat through a fluid is known as convection.
Respuesta
- True
- False
Pregunta 43
Pregunta
Radio waves have the longest wavelength and the highest frequency.
Respuesta
- True
- False
Pregunta 44
Pregunta
What is refraction?
Respuesta
-
When a wave bounces off a surface and some is absorbed.
-
When a wave spreads out through a gap.
-
When a wave enters a different density and changes direction.
Pregunta 45
Pregunta
What is the job of the step down transformers in the National Grid.
Respuesta
-
To lower the voltage for home use.
-
To bring electricity down from the overhead cables.
-
To lower the current to a safe level.
Pregunta 46
Pregunta
Choose the types of energy sources that are renewable.
Respuesta
-
Geothermal
-
Biofuels
-
Solar
-
Hydroelectric
-
Tidal
-
Nuclear
-
Wood
-
Coal
-
Oil
-
Gas
Pregunta 47
Pregunta
Wood is a renewable energy source.
Respuesta
- True
- False
Pregunta 48
Pregunta
What are two features of a longitudinal wave that do not occur in a transverse wave?
Respuesta
-
Compression and rarefaction.
-
Compression and refraction.
-
Concession and rarefaction.
Pregunta 49
Pregunta
An EM wave in a vaccum with a small wave length has what kind of frequency?
Respuesta
-
High
-
Low
Pregunta 50
Pregunta
What is the name of the network that connects power to the homes and businesses in the UK?
Respuesta
-
National Rail
-
British gas
-
National Grid
-
British Power
-
National board of Electric and Power
Pregunta 51
Pregunta
Which of these is the correct formula (units only)
Respuesta
-
m/s=Hz x m
-
m/s=Hz / s
-
Hz= m/s / m
Pregunta 52
Pregunta
Gamma waves have the highest frequency of all the EM waves.
Respuesta
- True
- False
Pregunta 53
Pregunta
Select the limits of human hearing.
Respuesta
-
20 Hz
-
20 000 Hz
-
2 000 Hz
-
200 Hz
-
2 Hz
-
200 000 Hz
Pregunta 54
Pregunta
What unit do we use to measure energy?
Respuesta
-
J
-
N
-
W
-
Cal
-
K
Pregunta 55
Pregunta
What is the correct formula for calculating efficiency?
Respuesta
-
(useful energy out / total energy in) x100
-
(useful energy out x 100) / total energy in
-
(total energy in / useful energy out) x 100
-
(total energy in x useful energy out) / 100
Pregunta 56
Pregunta
What type of energy is contained within biomass?
Respuesta
-
Nuclear
-
Chemical
-
Thermal
Pregunta 57
Pregunta
What does a step up transformer do?
Respuesta
-
Increases amps
-
Increases volts
-
Increases ohms
Pregunta 58
Pregunta
Particles vibrate and knock into the surrounding particles, transferring energy along. This is...
Respuesta
-
Conduction
-
Convection
-
Radiation
Pregunta 59
Pregunta
What is the frequency of the mains electricity in the UK?
Respuesta
-
50Hz
-
5Hz
-
500Hz
-
5000Hz
Pregunta 60
Pregunta
What are the three types of ionising radiation in the EM spectrum?
Respuesta
-
Alpha
-
Beta
-
Gamma
-
Ultra violet
-
X-ray
-
Nuclear
Pregunta 61
Pregunta
Sound travels as a wave.
Respuesta
- True
- False
Pregunta 62
Pregunta
Sound waves are transverse
Respuesta
- True
- False
Pregunta 63
Pregunta
Sound waves are mechanical
Respuesta
- True
- False
Pregunta 64
Pregunta
What is the unit of measurement for frequency?
Respuesta
-
Hz
-
db
-
m/s
-
kW
Pregunta 65
Pregunta
Why do objects appear smaller underwater?
Respuesta
-
Refraction
-
Reflection
-
Diffraction
Pregunta 66
Pregunta
P x t =
Respuesta
-
E
-
N
-
Q
-
V
Pregunta 67
Pregunta
Why do animals in warm climates have big ears?
Respuesta
-
To hear predators coming from far away.
-
To increase heat loss (keep cool)
-
To appear taller and more intimidating
Pregunta 68
Pregunta
Select the ways of reducing heat loss in a home.
Respuesta
-
loft insulation
-
cavity wall insulation
-
water softeners/descalers
-
solar panels
-
double glazing
-
thermostats
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