Flashcards
PHYSICS 1 REVISION FLASHCARD
Flashcards do conjunto (26)
- 1When is energy transferred?When a substance changes temperature
- 2What does the amount of energy transferred depend on?Mass, temperature change and specific heat capacity
energy transferred = mass x shc x temperature change - 3What does energy transfer from and to?Energy is transferred from a hotter to a colder body
- 4What is temperature and what is it measured in?A measure of hotness and is measured in degrees C
- 5What is energy and what is it measured in?A measure of energy transfer and is measured in
- 6When is energy transferred?When a substance changes state
- 7What does the amount of energy transferred depend on?Mass and specific latent heat
energy transferred = mass x slh - 8Is air a good insulator? What does it do?Yes, it reduces energy transfer by conduction
- 9What is conduction in a solid by?Conduction in a solid is by the transfer of kinetic energy
- 10What does trapped air reduce? What are convection currents caused by?Trapped air reduces energy transfer by convection
They are caused by density changes - 11Why do shiny surfaces reflect infrared radiation?To reduce energy transfer
- 12How can energy transformations be represented?By Sankey diagrams
- 13What is the equation for efficiency?efficiency = useful energy output (x100%) / total energy input
- 14How can energy saving in the home be achieved? Give 4 examples- Double glazing
- Cavity wall Insulation
- Draught strip
- Reflecting foil
- Loft insulation
- Curtains
- Careful design - 15What do all waves have?All waves have amplitude, frequency and wavelength
wave length = frequency x wavelength - 16What do warm and hot objects emit? What is [answer] used for?The emit infrared radiation, infrared radiation is used for cooking
- 17What can microwaves be used for?Microwaves can be used for cooking and communication when transmitter and receiver are in line of sight
- 18How many is colours is laser light? Is it in phase or out of phase?Laser light is single colour and in phase
- 19What are laser light, visible light and infrared used to do?They are used to send signals along optical fibres by TOTAL INTERNAL REFLECTION
- 20What is total internal reflection?The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle
- 21What are digital and analogue signals used for? Are digital or analogue signals better/clearer?Communication
Digital signal signals are clearer - 22What digital signal allow? Give an example of a digital signal useThey allow many signals to be transmitted at the same time
Morse code is a digital code - 23What are all the waves in the electromagnetic spectrum? (hint: Red Men In Violet Underwear Xcite Grannies)Radio waves, Microwaves, Infrared, Visible, Ultraviolet, X-ray, Gamma Ray
- 24The energy of the wave a)________ as the wavelength b) _________.a) increases
b) decreases - 25What can all electromagnetic waves be?They can be reflected, refracted and diffracted
- 26Radio waves are used for what? What can longer wavelengths do?They are used for communication
They can diffract around obstacles
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- GCSE Core Science FlashCards sobre PHYSICS 1 REVISION FLASHCARD, criado por Taila Emes em 24-05-2016.
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- Taila Emes
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