Physics AS Level AQA LATEST UPDATE
Acceleration
change in V per unit t
Accurate
Measurement obtained using calibrated instruments correctly
Alpha radiation
Particle consisting of 2 P's and 2 N's
Amplitude
Max displacement of oscillating particle from equilibrium position
Annihilation
...
Acceleration
change in V per unit t
Accurate
Measurement obtained using calibrated instruments correctly
Alpha radiation
Particle consisting of 2 P's and 2 N's
Amplitude
Max displacement of oscillating particle from equilibrium position
Annihilation
Particle and antiparticle meet, destroy eachother and emit radiation
Antibaryon
Hadron w/ 3 quarks
Antimatter
Antiparticles with same quantum values but opposite charge to corresponding particles
Antinode
Fixed point on stationary wave where amplitude is maximum
Atomic number Z
Number of P's in atom nucleus
Baryon
Hadron w/ 3 quarks
Base units
Units that define the SI system:
Kg
Amp
S
M
Beta radiation
,when B- or B+ particles are emitted following decay of a neutron-rich or proton-rich
nucleus
Breaking stress/Ultimate tensile stress
Tensile stress needed to break a solid material
Brittle
Snaps without bending or stretching when subject to stress
Centre of mass
Point through which a single force on the body has no turning affect
Charge carriers
Charged particles that move through substance when PD applied across it
Kirchoff's 1st Law
Current passing through 2 or more components in series is the same through each
component
At a junction the total current in = total current out
Kirchoff's 2 Law
2 or more components in series - total PD across all the components is = to sum of the
PD's across each component
Sum of emf's around complete loop = sum of PD's around the loop
Coherent
Constant phase difference and same frequency
Conservation rules
Rule that:
Baryon no
Lepton no
Charge
Energy
Momentum
always conserved in interactions
, When is strangeness conserved?
Strong interactions
How are strange particles created?
Strong interactions
How to strange particles decay?
Weak interactions
Couple
Pair of equal and opposite forces acting upon the same body but not along the same
line
Critical angle
The angle of incidence of a light ray must exceed this angle for total internal reflection to
occur
Critical temperature
Temperature at or below which a superconducting material has zero resistivity
Cycle
Interval for an oscillating particle from a certain displacement and velocity to the next
time the particle has identical displacement and velocity
de Broglie wavelength
Wavelength of a matter particle
deexcitation
process by which atom loses energy by photon emission as electron moves to lower
energy level - inner shell
density
mass per unit volume for substance
diffraction
spreading out of waves that pass through gap or near edge
diffraction grating
plate with close parallel slits on it
dispersion
splitting of beam of white light into colours by prism
displacement
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