Units and Measurement (Physics)

Recall cards on units and measurement: the scope and scale of physics (physics as a science, orders of magnitude, models, theories, and laws, and the length, mass, and time scales of the universe); units and standards (physical quantities, base versus derived quantities, the seven SI base quantities and units, the modern second and meter standards, and metric prefixes); unit conversion with conversion factors; dimensional analysis (the base-dimension symbols L, M, T, I, theta, N, and J, dimensionless quantities, dimensional consistency, and transcendental arguments); estimates and Fermi calculations; significant figures (accuracy versus precision, uncertainty versus discrepancy, percent uncertainty, counting significant figures, and the rules for arithmetic operations and exact numbers); and the three-stage strategy for solving physics problems.