1. Uncertainty The quantum uncertainty in the position of a particle (referred to in the Heisenberg Uncertainty Principle) is due to A.The fact that the particle’s wavefunction is spread out in space. B.Inaccurate measuring instruments. C.Our lack of knowledge of where the particle is.

2. True/False Atoms are individual, indivisible bits of matter.

3. PAL week 8 Monday Suppose an electron emits a Z particle, which has a rest mass of 91GeV/c 2. Suppose the electron is approximately at rest before and after it emits the Z. Where does the energy come from to create the Z? From nowhere – energy is not conserved! A) Determine the (minimum) amount by which conservation of energy is violated,  E. 91GeV B) Find the maximum amount of time that this Z can exist. 7.2X10 -27 s C) Find the maximum distance that the Z can travel, given that it cannot go faster than c. 2.2X10 -18 m