Flashcards
AQA, GCSE, combined science, PHYSICS
Cards in this deck (35)
- 1What is the equation that links: kinetic energy, mass, velocity?kinetic energy (j) = 1/2 mass * velocity^2
- 2What are the two equations for power?power (watt) = energy transferred (j) /time (s)
power (watt) = work done (j) / time (s) - 3What is meant by the term 'efficiency' ?The less energy that is 'wasted' the more efficient a product is.
- 4What is the equation for 'efficiency' ?efficiency = useful output energy/total input energy transfer.
- 5What is the 'National grid' and what are the 5 stages to the process?The 'National grid' is a giant system of cables and transformers that covers the UK and connect power stations to consumers.
Power stations, step up transformer, pylons, step down transformer, consumers. - 6What is current?flow of electrical charge
- 7What is the unit for 'potential difference'?volts, v
- 8What is the unit for resistance?ohms
- 9What is the equation that links current, charge flow, and time?charge flow (c) = current (a)*time (s)
- 10What is the equation for resistance?potential difference (v) = current (a) * resistance (ohms)
- 11What is DC?direct current - same direction.
- 12What is AC?alternating current - constantly changing direction.
- 13Mains electricity What colour is the 'live wire'?brown.
- 14Mains electricity Which wire is the colour 'blue' ?neutral wire
- 15Mains electricity What is colour is the earth wire?yellow and green
- 16Mains electricity what is the use of the 'live wire' ?carries the alternating potential difference form the supply.
- 17Mains electricity What is the use of the 'neutral wire' ?completes the circuit.
- 18Mains electricity What is the use of the 'earth wire' ?safety wire to stop the appliance becoming live.
- 19What is the equation for density?density (kg/m^3) = mass (kg) / volume (m^3)
- 20What is 'specific heat capacity' ?SHC of a substance is the amount of energy needed to raise the temperature of 1kg of the substance to 1^.
- 21What is the equation for SHC?change in thermal energy = mass * SHC * temperature change
- 22What is specific latent heat of fusion?energy needed to change the state from solid to liquid.
- 23What is specific latent heat of vaporisation?energy needed to change the state from liquid to vapour.
- 24What is the equation for SLH of vaporisation?energy (j) = mass (kg) * SLH (j/kg)
- 25What increases the electrons distance from the nucleus?absorbs electromagnetic radiation.
- 26What decreases the electrons distance from the nucleus?emits electromagnetic radiation.
- 27What is a alpha particle?Is a helium nuclei. 2 protons and 2 neutrons.
- 28What is a beta particle?Is a high speed electron. virtually no mass (-1).
- 29What is gamma ray?Is a electromagnetic waves emitted from the nucleus.
- 30What is alpha decay?decreases the charge and mass of the nucleus.
- 31What is bata decay?increases the charge of the nucleus.
- 32What is gamma decay?doesn't change anything.
- 33What is half-life?the half-life is the time taken for the number of radioactive nuclei in an isotope to halve.
- 34What is contamination?radioactive particles that get into the other objects.
- 35What is irradiation?the process of exposing objects to nuclear radiation.
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- Paper 1 flash cards.
- Created by
- Evangeline Jose · Mar 2018
- Updated
- Mar 11, 2018
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