AQA Physics paper 1 (Questions and Answers A+ Graded 100% Verified)

AQA Physics paper 1 (Questions and Answers A+ Graded 100% Verified) Energy is transferred between stores ANS: Thermal, kinetic, gravitational potential, elastic potential, chemical, magnetic, electrostatic, nuclear Energy is transferred... ANS: Mechanically (by a force doing work), electrically (work done by moving charges), by heating or by radiation (like light or sound) When a system changes, energy is transferred ANS: It can be transferred into or away from the system, between objects in the system or between different types of energy stores. Closed systems are where neither matter nor energy can enter or leave. The net change in the total energy of a closed system is always 0 kinetic energy ANS: energy of motion - the greater an object's mass and the faster it is going, the more energy there will be in its kinetic energy store. Ek (j) = 1/2m(kg)v(m/s) squared Raised objects store energy in gravitational potential energy stores ANS: lifting an object in a gravitational field requires work, causing an energy transfer to the the GPE store of the object. Ep(j) = m(kg)g(n/kg)h(m) Falling objects transfer energy ANS: Falling objects transfer energy from its GPE store to its kinetic energy store. When there's no air resistance, energy lost from the GPE store = energy gained in the kinetic energy store Stretching transfers energy to elastic potential energy stores ANS: As long as the limit of proportionality has not been exceeded, Ee (j) = 1/2 k (N/m) e (m) squared specific heat capacity ANS: the energy required to raise the temperature of one gram of a substance by one degree Celsius. �E (j) = m(kg) c(j/kgdegree) �theta (degrees Celsius) Conservation of energy principle ANS: Energy can be transferred but can never be created of destroyed Dissipated energy ANS: energy used up in a system, typically lost due to work done by friction, 'wasted energy' Phone energy ANS: When you use the phone, e