2023 AQA Alevel PHYSICS 7408/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
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Course
2023 AQA Alevel PHYSICS
Institution
2023 AQA Alevel PHYSICS
2023 AQA Alevel
PHYSICS
7408/1 Paper 1
Question Paper
& Mark scheme
(Merged) June
2023 [VERIFIED]
Energy is transferred between storesANSWERThermal,
kinetic, gravitational potential, elastic potential, chemical,
magnetic, electrostatic, nuclear
Energy is transferred...ANSWERMechanically (...
2023 AQA A-
level PHYSICS
7408/1 Paper 1
Question Paper
& Mark scheme
(Merged) June
2023 [VERIFIED]
,Energy is transferred between stores✔✔✔ANSWER➖Thermal,
kinetic, gravitational potential, elastic potential, chemical,
magnetic, electrostatic, nuclear
Energy is transferred...✔✔✔ANSWER➖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✔✔✔ANSWER➖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✔✔✔ANSWER➖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✔✔✔ANSWER➖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✔✔✔ANSWER➖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✔✔✔ANSWER➖As long as the limit of proportionality
has not been exceeded, Ee (j) = 1/2 k (N/m) e (m) squared
specific heat capacity✔✔✔ANSWER➖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✔✔✔ANSWER➖Energy can
be transferred but can never be created of destroyed
Dissipated energy✔✔✔ANSWER➖energy used up in a system,
typically lost due to work done by friction, 'wasted energy'
Phone energy✔✔✔ANSWER➖When you use the phone,
energy is usefully transferred from the chemical energy store of
the battery in the phone, but some of this energy is dissipated to
thermal energy
, Closed system energy transfer✔✔✔ANSWER➖A cold spoon is
dropped into hot soup in an insulated flask, which is then sealed.
Energy is transferred from the thermal energy store of the soup
to the useless thermal energy of the spoon
Power✔✔✔ANSWER➖The rate at which work is done (watts).
P(w) = E(j) / t(s)
Powerful machine✔✔✔ANSWER➖One which transfers a lot
of energy in a short space of time
Conduction occurs mainly in
solids✔✔✔ANSWER➖Conduction is the process where
vibrating particles transfer energy to neighbouring particles.
Long definition of conduction✔✔✔ANSWER➖Energy
transferred to an object by heating is transferred to the thermal
store, which is shared across the kinetic store of the particles.
The particles' collisions cause energy to be transferred between
particles kinetic energy stores.
thermal conductivity✔✔✔ANSWER➖the Mrs sure of the rate
at which thermal energy can travel through a material
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