Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. ... But Einstein’s equation says it also has energy when it’s stationary.

Maxwell's equations are sort of a big deal in physics. They're how we can model an electromagnetic wave—also known as light. Oh, it's also how most electric generators work and even electric motors.

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Physics Formulas for Class 10: Download Class 10 Physics Formulas PDF, lens formula, mirror formula, potential difference, magnification, Snell’s law of refraction, and electricity formulas.