Karteikarten
Physics Unit 1
Karten in diesem Stapel (38)
- 1What do all objects do?They emit and absorb infrared radiation
- 2what happens if an object is hotter?The more infrared radiation it gives
- 3What surfaces are good absorbers and emitters of radiation?Dark matt surfaces
- 4What surfaces are poor absorbers and poor emitters of radiation?Light shiny surfaces
- 5What are good reflectors of infrared radiation?Light shiny surfaces
- 6In kinetic theory what is different about the particles of solids, liquids and gases?They all have different amounts of energy
- 7What does the transfer of energy by conduction, convection, evaporation and condensation involve?Particles
- 8What does the effect of having a bigger temperature cause to energy transfer?It speeds up the rate of energy transfer
- 9what does a U-Value mean?It measures how effective an insulator is
- 10The lower the U- value.......The better the material is at insulating
- 11What may solar panels contain?Water that is heated by the sun, this water may then be used to heat buildings or for domestic hot water
- 12What is the specific heat capacity of a substance?The amount of energy required to change the temperature of one kilogram of the substance by one degree Celsius
- 13What can energy not be?Created or destroyed
- 14When energy is transferred what happens?Only part of it is usefully transferred the rest is 'wasted'
- 15Where is wasted energy usually transferred to?The surroundings which become increasingly warmer. The wasted energy becomes increasingly spread out so less useful
- 16What energy sources are there?Fossil fuels
Uranium and Plutonium
Biofuels - 17What can water and wind be used to do?Drive turbines directly
- 18Where can electricity be produced directly from?The sun's radiation
- 19What is geothermal energy?In volcanic areas hot water and steam rise to the surface. This steam can be tapped and used to drive turbines
- 20How electricity is distributed from power stations to consumers?Along the National Grid
- 21What does increasing the voltage and reducing the current do?Reduces the energy losses at cables
- 22What do waves transfer?energy
- 23What type of waves are transverse?Electromagnetic waves and mechanical waves
- 24What type of waves are longitudinal?Sound waves and mechanical waves
- 25What sort of spectrum do electromagnetic waves form?Continuous
- 26What do longitudinal waves show?Areas of compression and rarefraction
- 27What can waves be?Reflected, refracted and defracted
- 28What do waves undergo when they are refracted at the interface?A change in direction
- 29What can radio, infra red, and visible light all be used for?Communication
- 30What is the angle of incidence equal to?The angle of reflection
- 31What is an image produced in a plane mirror?Virtual
- 32What is the pitch of a sound determined by?frequency
- 33What is the volume of a sound determined by?Amplitude
- 34What is Doppler Effect?If a wave source is moving relative to anobserver there will be a change in theobserved wavelength and frequency
- 35What is Red-shift?There is an observed increase in the wavelength of light from most distant galaxies. The further away the galaxies are, the faster they are moving,andthe bigger the observed increase in wavelength
- 36What does Red-Shift provide evidence for?The Big Bang Theory
- 37What is cosmic microwave background radiation?a form of electromagnetic radiation filling the universe. It comes from radiation that was present shortly after the beginning of the universe.
- 38What is the only theory that can explain the existence of CMBR?The BIg Bang theory
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- Karteikarten am Physics Unit 1, erstellt von Lotte Davis am 22/03/2016.
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- Lotte Davis · Mär 2016
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- 24 Mai 2016
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