Pregunta 1
Pregunta
What colours on a thermogram represent hot temperatures?
Respuesta
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White
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Blue
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Yellow
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Red
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Black
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Purple
Pregunta 2
Pregunta
Define: Temperature
Respuesta
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= a measurement of energy on an absolute scale.
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= a measurement of the average kinetic energy of particles.
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= total energy of all particles.
Pregunta 3
Pregunta
Thermal energy always flows from a hotter area to a cooler one.
Pregunta 4
Pregunta
What is the equation for specific heat capacity?
Pregunta 5
Pregunta
When a substance melts or solidifies there is no temperature change.
Pregunta 6
Pregunta
The kinetic energy of particles increases at colder temperatures.
Pregunta 7
Pregunta
What does arrow A on this graph showing changes of states represent?
Respuesta
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Melting
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Boiling
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Freezing
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Condensing
Pregunta 8
Pregunta
What does arrow B on the graph showing the changes of state of water represent?
Respuesta
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Melting
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Boiling
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Freezing
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Condensing
Pregunta 9
Pregunta
What are the 3 types of thermal transfer?
Respuesta
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Conduction
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Radiation
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Nuclear
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Convection
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Sun
Pregunta 10
Pregunta
Conduction can work in solids because the particles pass their energy to neighbouring particles.
Pregunta 11
Pregunta
Warmer regions of a fluid are more dense than cooler regions of fluid.
Pregunta 12
Pregunta
What 2 surfaces are the best for absorbing and emitting radiation?
Respuesta
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Black
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Shiny
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White
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Matt
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Silver
Pregunta 13
Pregunta
Which of the options below are methods of insulation?
Respuesta
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Curtains and draught excluders
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Cavity walls
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Double glazing
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Carpets and underfloor insulation
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Reflective foil behind radiators
Pregunta 14
Pregunta
What is this a diagram showing?
Respuesta
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Energy flow
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Wasted energy
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Efficiency
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Useful energy
Pregunta 15
Pregunta
The higher the efficiency the less energy is wasted.
Pregunta 16
Pregunta
If you put ice cubes in a glass, why do they melt?
Respuesta
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The ice cubes cool the surroundings.
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The surroundings transfer heat to the ice cubes.
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The ice cubes need to be kept in the freezer.
Pregunta 17
Pregunta
What is the definition of a wave?
Respuesta
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The transfer of energy without the transfer of matter.
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The movement of energy through water.
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The movement of particles in any surface/object.
Pregunta 18
Pregunta
The definition of a longitudinal wave is...
Pregunta 19
Pregunta
Define: Frequency
Pregunta 20
Pregunta
Light travels in straight lines.
Pregunta 21
Pregunta
In the reflection of light, the angle of incidence is greater than the angle of reflection.
Pregunta 22
Pregunta
How does the speed of light change when it enters a denser material?
Respuesta
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It speeds up
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It slows down
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It doesn't change
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It stops
Pregunta 23
Pregunta
In refraction, the emergent ray bends towards the normal.
Pregunta 24
Pregunta
Define: Diffraction
Pregunta 25
Pregunta
Which of the 3 statements below are true about ionising waves?
Respuesta
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They have a severe effect on living tissue by killing cells or damaging DNA.
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They are harmless to humans.
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They have a short wavelength and high frequency.
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They carry lots of energy.
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They have a long wavelength and low frequency.
Pregunta 26
Pregunta
What is the order of the waves in the electromagnetic spectrum? (starting with highest frequency and shortest wavelength)
Respuesta
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X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Gamma, Radio waves
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Gamma, X-Ray, Ultraviolet, Visible, Infrared, Microwaves, Radio waves
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Gamma, Ultraviolet, Visible, X-Ray, Infrared, Microwaves, Radio waves
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Radio waves, Gamma, X-Ray, Visible, Infrared, Ultraviolet, Microwaves,
Pregunta 27
Pregunta
Which of the following are uses of gamma waves?
Pregunta 28
Pregunta
Select the 3 properties off Infrared waves.
Respuesta
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They can burn human tissue by transferring their energy to our skin.
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They are reflected by metal surfaces.
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They can't penetrate materials such as plastic and glass.
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They are harmless to humans.
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They can pass through glass and plastic.
Pregunta 29
Pregunta
Infrared waves are absorbed by food during cooking.
Pregunta 30
Pregunta
How does a microwave oven cook food?
Respuesta
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The fan reflects waves from the turbine. They fill the oven and cook the food.
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The fan reflects waves from the generator. They bounce off the walls and cook the food.
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The fan reflects waves from the magnetron. They reflect off the walls and cook the food.
Pregunta 31
Pregunta
What is the critical angle of glass?
Respuesta
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40 degrees
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41 degrees
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42 degrees
Pregunta 32
Pregunta
What is one benefit for patients when using an endoscope?
Respuesta
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Patients will have a quicker recovery time as the surgery is less intrusive so no risk of infection.
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The operation hurts less.
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The doctor doesn't have to use a knife.
Pregunta 33
Pregunta
What are the 2 methods that can be used for multiplexing?
Respuesta
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Different colours
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Different sizes
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Different times
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Different divisions
Pregunta 34
Pregunta
An analogue signal varies continuously in amplitude and frequency.