IB Physics Energy Test Study Guide

Primary vs. Secondary Energy Source

1. Primary occurs naturally and has not been processed2.Secondary is a primary source converted in a more useful source

Role of moderator

slows down neutrons to increase the probability of them colliding with uranium-235 nucleus to cause fission

specific energy

available energy stored in a material per unit mass (Jkg-1)

energy density

availdable energy stored in a material per unit volume (Jm-3)

Photovoltaic cell

converts light energy into electrical energy

Solar Heating Panel

transfers thermal energy from sun to internal energy in water