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Particle Physics
| Question | Answer |
|---|---|
| What three things are conserved in nuclear reactions? | Mass-energy, momentum, and electric charge. |
| Why is the neutrino hard to detect? | It only interacts very weakly with matter |
| Who first split a nucleus by artificially accelerated particles? | John Cockroft and Ernest Walton |
| What did Cockroft and Waltons experiment verify | E=mc^2 |
| Define pair production | The creation of a particle and its antiparticle from energy with momentum and electric charge being conserved |
| Define pair annihilation | When a particle and its antiparticle are almost at rest near each other they join together to create two photons of equal energy travelling in opposite directions. |
| Name the four forces in increasing order of strength | Gravity, weak nuclear force, electromagnetic, strong nuclear force |
| What is the range of strong nuclear force | 10^-15 meters |
| What is the range of weak nuclear force | 10^-18 meters |
| What is the range of electromagnetic force | infinite |
| What is the range of gravity | Infinite |
| What particles feel strong nuclear force | Hadrons |
| Name two groups of elementary particles | Leptons & Quarks |
| Name two members of the Hadron family | Baryons & Mesons |
| Name the six flavours of Quarks | Up, down, charmed, strange, top, bottom |
| What are mesons made from | A quark and anti quark |
| What are Baryons made of | Any three quarks or anti quarks |
| What is the composition of a proton | UUD |
Created by:
JackEatonK98
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