Exam prep · Free college course
A complete second-semester algebra-based physics course, built from OpenStax College Physics 2e chapters 18 through 34 and the C-ID PHYS 110 transfer descriptor, with AP Physics 2 as a cross-check. It starts with electric charge, Coulomb's law and electric fields, then potential and capacitance, current and Ohm's law, DC circuits with Kirchhoff's rules, and magnetism, before electromagnetic induction and AC circuits. The second half covers electromagnetic waves, geometric and wave optics (lenses, mirrors, interference and diffraction), then special relativity, quantum physics, atomic physics, nuclear physics and medical applications, and a short unit on particle physics and frontiers. No calculus is needed, and this is the most diagram-dependent course of the six: every circuit, ray diagram and field-line question is instead fully described in words, with equation-sheet notes at the head of every chapter. About a fifth of the cards are worked calculations (Coulomb's law, RC and Kirchhoff circuit problems, thin-lens and mirror equations, Snell's law, time dilation, photon energy, half-life), each independently recomputed before publishing.
Copied straight from the course. In the app, each wrong option also gets its own explanation.
Card 1What is a quantum, as introduced by Planck?
The smallest discrete amount of a physical quantity that can be emitted or absorbed.. A quantum is the smallest discrete packet of a quantity such as energy that can be emitted or absorbed, per Planck's hypothesis.
Card 2What is the mass defect of a nucleus?
The difference between the total mass of its separate, unbound nucleons and the actual (smaller) mass of the bound nucleus.. Mass defect is the mass lost when separate protons and neutrons bind together into a nucleus, and it is directly converted to binding energy via E = (delta-m)c^2.
Card 3Which of the following is true about the relationship between t and t0 in time dilation?
t is always greater than or equal to t0, since gamma >= 1. Since gamma = 1/sqrt(1 - v^2/c^2) is always >= 1, t = gamma t0 is always the longer of the two times.
Yes. Create a free Encodr account and all 15 units and 951 cards are yours to study, with spaced repetition scheduling your reviews.
No, the two courses do not depend on each other, but College Physics I (mechanics, fluids, thermal physics, waves and sound) is the natural first semester if you have not taken it yet.
OpenStax College Physics 2e chapters 18 through 34: electric charge and field, electric potential and capacitance, current and Ohm's law, DC circuits, magnetism, electromagnetic induction and AC circuits, electromagnetic waves, geometric and wave optics, special relativity, quantum physics, atomic physics, nuclear physics and medical applications, and particle physics.
Every circuit is described fully in words (each resistor and voltage stated), and every lens or mirror problem gives the object distance and focal length so it can be solved from the sign-convention rules in that chapter's notes card, instead of showing a picture.
About a fifth of the cards are worked calculations. Every numeric card gives its values and constants in the prompt, states its rounding rule, and was independently recomputed before publishing. The rest are concept cards aimed at the classic misconceptions in E&M and modern physics.