Physics AS Level AQA 2024 Updated Exam

Physics AS Level AQA 2024 Updated Exam Acceleration - ANSWER- change in V per unit t Accurate - ANSWER- Measurement obtained using calibrated instruments correctly Alpha radiation - ANSWER- Particle consisting of 2 P's and 2 N's Amplitude - ANSWER- Max displacement of oscillating particle from equilibrium position Annihilation - ANSWER- Particle and antiparticle meet, destroy eachother and emit radiation Antibaryon - ANSWER- Hadron w/ 3 quarks Antimatter - ANSWER- Antiparticles with same quantum values but opposite charge to corresponding particles Antinode - ANSWER- Fixed point on stationary wave where amplitude is maximum Atomic number Z - ANSWER- Number of P's in atom nucleus Baryon - ANSWER- Hadron w/ 3 quarks Base units - ANSWER- Units that define the SI system: Kg Amp S M Beta radiation - ANSWER- when B- or B+ particles are emitted following decay of a neutron-rich or proton-rich nucleus Breaking stress/Ultimate tensile stress - ANSWER- Tensile stress needed to break a solid material Brittle - ANSWER- Snaps without bending or stretching when subject to stress Centre of mass - ANSWER- Point through which a single force on the body has no turning affect Charge carriers - ANSWER- Charged particles that move through substance when PD applied across it Kirchoff's 1st Law - ANSWER- 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 - ANSWER- 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 - ANSWER- Constant phase difference and same frequency Conservation rules - ANSWER- Rule that: Baryon no Lepton no Charge Energy Momentum always conserved in interactions When is strangeness conserved? - ANSWER- Strong interactions How are strange particles created? - ANSWER- Strong interactions How to strange particles decay? - ANSWER- Weak interactions Couple - ANSWER- Pair of equal and opposite forces acting upon the same body but not along the same line Critical angle - ANSWER- The angle of incidence of a light ray must exceed this angle for total internal reflection to occur Critical temperature - ANSWER- Temperature at or below which a superconducting material has zero resistivity Cycle - ANSWER- 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 - ANSWER- Wavelength of a matter particle deexcitation - ANSWER- process by which atom loses energy by photon emission as electron moves to lower energy level - inner shell