# calculations

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specific charge
charge / mass = (Ckg-1)
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strong nuclear force
attractive force that holds the nucleons in the nucleus
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antimatter
antiparticles that each have the same rest mass (equal & oppositely changed)
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annihilation
when a particle and its antiparticle - destroy each other and become radiation
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acceleration
change of velocity per unit time
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critical angle
the angle of inidence of a light ray must exceed this for total internal reflection
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diffraction
spreading of waves on passing through a gap
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electromagnetic wave
electric & magnetic photon/ wavepacket that can travel through free space
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electron capture
process in which the inner shell electron is captured y the nucleus
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particles & antiparticles that can interact through the strong interactions ; can feel the strong nuclear force ; made up of quarks
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hookes law
the extension of a spring is proportional to the force needed to extend it
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leptons
fundamental particles ; don't feel the nuclear force
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bayrons
B=1 ; protons (stable) & neutrons (decays) ; made of 3 quarks
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mesons
B=0 ; all unstable ; pions (light) kaons ( heavy & more unstable) ; 1 quark
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conserved
charge ; baryon number ; strangeness ; lepton number ; energy ; momentum
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photoelectic effect
light ( greater than threshold frequency) shines on metal surface to emit electron ; free electrons on surface absorb energy = vibrate ; bond breaks& electrons released
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## Other cards in this set

### Card 2

#### Front

attractive force that holds the nucleons in the nucleus

#### Back

strong nuclear force

### Card 3

#### Front

antiparticles that each have the same rest mass (equal & oppositely changed)

### Card 4

#### Front

when a particle and its antiparticle - destroy each other and become radiation

### Card 5

#### Front

change of velocity per unit time