5505600
Descripción
Test por Lilac Potato, actualizado hace más de 1 año
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Creado por Lilac Potato
hace más de 8 años
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Pregunta 1
Pregunta
Convection is the main form of heat transfer in...............?
Respuesta
-
Solids
-
Liquids
-
Gases
Pregunta 2
Pregunta
The [blank_start]bigger[blank_end] the temperature difference, the faster the heat transfer.
Respuesta
-
bigger
-
smaller
Pregunta 3
Pregunta
Which of these surfaces are good at absorbing & emitting IR radiation?
Respuesta
-
Dark
-
Matt
-
Light
-
Shiny
Pregunta 4
Pregunta
Conduction is faster in denser solids because the particles are closer together and will collide more often.
Respuesta
- True
- False
Pregunta 5
Pregunta
Why are metals good conductors?
Respuesta
-
Because they have free electrons
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Because their particles are closer together
-
Because their particles move faster
Pregunta 6
Pregunta
Why does water become less dense when it is heated?
Respuesta
-
Because the particles gain heat energy and spread apart
-
The heat makes the particles lighter
-
Because the particles lose heat energy and spread apart
Pregunta 7
Pregunta
The fastest particles are most likely to evaporate, [blank_start]decreasing[blank_end] the average speed of the remaining particles.
Respuesta
-
decreasing
Pregunta 8
Pregunta
The rate of condensation will be faster if.........
Respuesta
-
Temperature of gas is lower
-
Temperature of gas is higher
-
Density is higher
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Density is lower
-
Airflow is less
-
Airflow is greater
Pregunta 9
Pregunta
The larger the surface area, the [blank_start]faster[blank_end] the heat transfer.
Respuesta
-
faster
-
slower
Pregunta 10
Pregunta
Why are the walls of a vacuum flask silvered?
Respuesta
-
To reduce heat loss by radiation
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To reduce heat loss by conduction
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To reduce heat loss by convection
Pregunta 11
Pregunta
How do you work out payback time?
Respuesta
-
Initial cost / Annual saving
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Annual saving / Initial cost
Pregunta 12
Pregunta
The better the insulator, the [blank_start]lower[blank_end] the U-value.
Respuesta
-
lower
-
higher
Pregunta 13
Pregunta
What are the units for Specific Heat Capacity?
Respuesta
-
J/kg°C
-
J/kg
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J/°C
Pregunta 14
Pregunta
Conservation of Energy Principle: Energy can be transferred, stored or dissipated but it can never be [blank_start]created[blank_end] or destroyed.
Respuesta
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created
Pregunta 15
Pregunta
Energy is most often lost as......
Respuesta
-
Heat
-
Sound
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Kinetic
-
Light
Pregunta 16
Pregunta
What are the standard units for electrical energy?
Respuesta
-
kWh
-
Joules
-
Watts
Pregunta 17
Pregunta
What effect can access to electricity have on standard of living?
Respuesta
-
Public health
-
Communications
-
Malnutrition
Pregunta 18
Pregunta
Which of these represents the energy transfer when burning a fossil fuel to generate electricity?
Respuesta
-
Chemical ---> Heat ---> Kinetic ---> Electrical
-
Heat ---> Kinetic ---> Chemical ---> Electrical
-
Chemical ---> Kinetic ---> Heat ---> Electrical
Pregunta 19
Pregunta
Which of these renewable energy sources cause permanent damage to the landscape?
Respuesta
-
Wind power
-
Solar power
-
Hydroelectric power
-
Tidal power
Pregunta 20
Pregunta
Which of these is the main advantage of HEP?
Respuesta
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Can store energy
-
Little environmental impact
-
Low start up costs
Pregunta 21
Pregunta
Wave power can be harnessed by using the [blank_start]up and down[blank_end] motion of the waves to drive a generator.
Respuesta
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up and down
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side to side
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up
Pregunta 22
Pregunta
Which of these is a major disadvantage of geothermal energy?
Respuesta
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It can only be done in a few locations
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It is difficult to use the energy
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It produces a lot of polluting gases
Pregunta 23
Pregunta
Which of these power stations takes the least amount of time to set up?
Respuesta
-
Natural gas
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Oil
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Coal
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Nuclear
Pregunta 24
Pregunta
How do biofuels harm the environment?
Respuesta
-
They are 'carbon neutral'
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They require clearance of large areas of forest
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They release a lot of methane when the plants grow
Pregunta 25
Pregunta
Where is captured carbon dioxide pumped to in CCS?
Respuesta
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Empty gas & oil fields
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The ocean
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The atmosphere
Pregunta 26
Pregunta
What is the National Grid?
Respuesta
-
A system of cables and pylons
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A system of cables and transformers
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A system of cables, transformers and power stations
Pregunta 27
Pregunta
How can our demand for electricity be reduced?
Respuesta
-
Consumers using more energy-efficient appliances
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Being more careful not to waste energy in the home
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Opening more power plants
Pregunta 28
Pregunta
Frequency is the number of waves produced in one [blank_start]second[blank_end].
Respuesta
-
second
Pregunta 29
Pregunta
Sound waves are an example of a transverse wave.
Respuesta
- True
- False
Pregunta 30
Pregunta
Angle of incidence [blank_start]equals[blank_end] angle of reflection.
Respuesta
-
equals
Pregunta 31
Pregunta
Which of these describe the image in a plane mirror?
Respuesta
-
Same size as object
-
Bigger than object
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Virtual
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Real
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Upright
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Upside down
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Laterally inverted
Pregunta 32
Pregunta
In diffraction, the narrower the gap, the [blank_start]more[blank_end] the wave spreads out.
Respuesta
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more
-
less
Pregunta 33
Pregunta
What happens when a wave travels along the normal?
Respuesta
-
It will change speed but not be refracted
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It will change speed and be refracted
Pregunta 34
Pregunta
What is the approximate range of wavelengths of electromagnetic waves?
Respuesta
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10^−15 metres to 10^4 metres
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10^−4 metres to 10^15 metres
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10^−6 metres to 10^6 metres
Pregunta 35
Pregunta
How are long-wave radio waves (1-10 km) transmitted?
Respuesta
-
They diffract around the curved surface of the Earth
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They are reflected from the ionosphere
Pregunta 36
Pregunta
The higher the frequency of a wave, the [blank_start]shorter[blank_end] the wavelength.
Respuesta
-
shorter
Pregunta 37
Pregunta
Which of these are uses of Infrared waves?
Respuesta
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Satellite communication
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Mobile phones
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Remote controls
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Optical fibres
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Photography
Pregunta 38
Pregunta
The bigger the amplitude, the [blank_start]louder[blank_end] the sound.
Respuesta
-
louder
Pregunta 39
Pregunta
When we look at light from distant galaxies we see the same patterns but at slightly [blank_start]lower[blank_end] frequencies
Respuesta
-
lower
-
higher
Pregunta 40
Pregunta
The further away a galaxy is, the greater the red-shift.
Respuesta
- True
- False
Pregunta 41
Pregunta
Which of these describes the Big Bang theory?
Respuesta
-
All matter & energy compressed into small space which exploded & is still expanding.
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Universe has always existed as it is now - expansion can be explained by matter being created.
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