RefineYour physics textbook, remembered
Physics chapters are short on words and long on relationships: what happens to one quantity when another changes. That's exactly what the problems on the exam test.
The kind of question you get
Doubling the distance between two charges ___ the force between them.
- quarters (right)
- halves
- doubles
Why: by Coulomb's law the force falls with the square of the distance, so twice as far means a quarter of the force.
How it works
- Scan the pages you're assigned, or import your textbook's PDF. Using a free OpenStax textbook? Download its PDF and import it.
- Every chapter becomes something you can finish: a short read of what matters, and the full read when you need it. In a PDF, equations stay equations.
- A concept map of how the chapter's ideas affect each other.
- Questions about how it works, written from each chapter, with wrong answers that are wrong for a reason.
- A few minutes a day. Each question comes back just before you'd forget it, so the chapter is still there on exam day.
- Listen on the way to class, with each line lit as it's read.
What it is not
Refine helps you remember your textbook. It doesn't replace lectures or working the problems, and it won't do your homework.
Other subjects
Biology · Chemistry · Organic chemistry · Calculus · Anatomy & physiology · Nursing
Read the chapter once. Know it on exam day.
Refine launches on October 19 on iPhone, iPad and Mac.
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