We looked at 2003 PHY6 paper. 50 mins for comprehension part. PHY5 Mock next week? May depend upon getting hold of a recent paper.

26/04/05

We looked through the specimen synoptic paper. We'll look at further past PHY6 papers next week. Bear in mind that this one is worth 20% of the A level so must be nailed.

19/04/05

E = mc²

In radioactive decays and nuclear fission and fusion reactions, mass is converted into energy. Add up the total mass of particles before and after and you find a small discrepancy. This is called the mass defect. Multiply this mass defect by the speed of light squared and you have the amount of energy released.

Particle accelerators work in the opposite way. They use collisions involving very high kinetic energies to create mass, often exotic particles of interest to Physicists.

All mass-energy calculations have to be done to a very high number of significant figures when working with u the unified atomic mass unit.

u - one twelth the mass of a single carbon atom.

NB energies can often be quoted in electron volts - the number of joules in an electron volt is always given to you.

HW Assesment Q20....

11/04/05

At the end of last term we had just about worked our way through magnetism.