2015 Med Phys I Lecture 1.2 PreTest Question Title * 1. Name: Question Title * 2. The annihilation of positrons produces Gamma rays X-rays Other (please specify) Question Title * 3. Identify the following radiations as directly or indirectly ionizing radiation. directly indirectly electrons electrons directly electrons indirectly neutrons neutrons directly neutrons indirectly protons protons directly protons indirectly x-rays x-rays directly x-rays indirectly Question Title * 4. The SI unit of exposure is the Coulomb per kilogram Erg Gray Joule per kilogram Question Title * 5. The SI unit of activity is the Becquerel Curie Gray Hazle Question Title * 6. The linear attenuation coefficient is the amount of energy deposited in a given path length fraction of energy deposited in a given path length fraction of particles that interact in a given path length number of particles that interact in a given path length Question Title * 7. Are there any issues that are not clear to you at this time? Done