AQA AS PHYSICS 7407/1 Paper 1 Mark scheme (Test Bank) June 2024 With 100% Correct Questions And Answers

AQA AS PHYSICS 7407/1 Paper 1 Mark scheme (Test Bank) June 2024 With 100% Correct Questions And Answers uses of friction - - rubbing hands for warmth - break pads on bikes Efficiency = - Useful Energy Output / Total Energy Input Increase efficiency - - add lubricant - reduce friction internal energy - the sum of the kinetic and potential energies of all particles in the system Conduction - The direct transfer of heat from one substance to another substance that it is touching. Convection - The transfer of thermal energy by the circulation or movement of a liquid or gas convection current - a current caused by the rising of heated fluid and sinking of cooled fluid Insulator - A material that does not allow heat or electrons to move through it easily. Infra red radiation - Electromagnetic waves of heat energy. Radiation - Energy that is radiated or transmitted in the form of rays or waves or particles. greenhouse effect - CO2 and other greenhouse gases in the atmosphere absorb long wavelength radiation radiated from the Earth's surface and prevent it escaping. black - good absorber of radiation white - poor absorber of radiation specific heat capacity - the energy required to raise the temperature of one gram of a substance by one degree Celsius Reduce heat loss from homes - - loft insulation (fibre glass is a good insulator) - cavity wall insulation (foam prevents convection currents) - aluminum foil behind radiator (reflects radiation) - double glazing (vacuum slows conduction and radiation) sound energy - Energy caused by an object's vibrations thermal energy - The total energy of motion in the particles of a substance chemical energy - A form of potential energy that is stored in chemical bonds between atoms. nuclear energy - the potential energy stored in the nucleus of an atom electrical energy - Energy caused by the movement of electrons. light energy - Energy in the form of moving waves of light kinetic energy - energy of motion gravitional potential energy - potential energy that depends on the height of an object elastic potential energy - the energy of stretched or compressed objects conservation of energy - law that says energy cannot be created or destroyed, but can change forms energy transfer - power x time non-renewable energy - A natural resource such as coal, gas, or oil that, once consumed, cannot be replaced. renewable energy - A resource that has a theoretically unlimited supply and is not depleted when used by humans. solar, wind, geothermal, hydropower, tidal, wave, nuclear, biofuel dis: unreliable (except hydroelectric and geothermal) nuclear power - energy from splitting Uranium atoms. dis: nuclear waste, expensive carbon neutral - an activity that does not change atmospheric carbon dioxide concentrations bulb - resistor - variable resistor -