Unit 3 · 5 lessons
Energy and Society
Work, the two mechanical energies and the law that connects them, then heat, phase change, half-life and where Ontario's electricity actually comes from.
- 50 practice questions
- 49 flashcards
- 1 interactive lesson
Lessons
- 1Work, Power and EfficiencyThe precise physics meaning of work — including when a force does none at all — and the two quantities that describe how fast and how well energy is transferred.10 questions
- 2Kinetic Energy, Potential Energy and ConservationThe energy of motion and the energy of position, and the law that lets you solve problems kinematics cannot touch.Interactive10 questions
- 3Thermal Energy, Heat Capacity and Phase ChangeWhy temperature and thermal energy are different, how much energy a substance needs to warm up, and why it takes so much more to melt or boil it.10 questions
- 4Nuclear Energy, Half-Life and Energy SourcesWhere the energy in a nucleus comes from, how radioactive decay is measured, and the real trade-offs behind Ontario's electricity supply.10 questions
- 5Thermal Energy in Buildings and the EnvironmentWhere the heat in a heated house actually goes, what an R-value is measuring, why a brick building stays cool, and how a heat pump delivers more heat than the electricity it consumes.10 questions