/.absolute zero - Answer-0K
273.16 degrees celcius
lowest possible temperature
/.Acceleration - Answer-change in V per unit t
/.Accurate - Answer-Measurement obtained using calibrated instruments correctly
/.activity - Answer-A - the number of nuclei of a radioactive isotope/substance that
decay per second
/.alpha decay - Answer-change in an unstable nucleus when it emits an a particle
/.alpha radiation - Answer-most ionising
range of around 5cm in air
absorbed by paper
/.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
/.applications of polarisers - Answer-sunglasses lenses - reduce glare
camera lenses - reduce glare
3D glasses lenses - improve picture quality
/.atomic mass unit - Answer-u - unified atomic mass constant ie 1/12th of the mass of
an atom of the Carbon-12 isotope
, /.Atomic number Z - Answer-Number of P's in atom nucleus
/.Avogadro constant Na - Answer-number of atoms in 12g of Carbon-12
/.background radiation - Answer-radiation due to naturally occurring radioactive
substances in the environment that is continuous
buildings
cosmic radiation
argon in air
/.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
/.binding energy of a nucleus - Answer-work that must be done to separate a nucleus
into its constituent neutrons and protons
= mass defect x c^2
/.binding energy per nucleon - Answer-average work that must be done - to separate a
nucleus into its constituent nucleons - per nucleon
/.boiling point - Answer-temperature at which pure liquid boils at atmospheric pressure
/.Boltzmann constant k - Answer-molar gas constant divided by the Avogadro number
/.Boyle's Law - Answer-for a fixed mass of gas at constant temperature P x V is
constant
/.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
/.Brownian motion - Answer-random and unpredictable motion of a particle caused by
the collisions with the molecules surrounding it at random