A balanced diet Slideshow Play

A ball on an inclined plane Animation Play

A ball on an inclined plane Animation Play

A ballistic pendulum Animation Play

A battery of cells Simulation Play

A battery of cells Animation Play

A battery of cells Student activity Play

A battery of cells Whiteboard exercise Play

A biconvex lens Animation Play

A black body Student activity Play

A black body Animation Play

A constant source of voltage Student activity Play

A constant source of voltage Simulation Play

A constant source of voltage Whiteboard exercise Play

A diagram of a nuclear power station Illustration Play

A light bulb Animation Play

A microscopic view Animation Play

A mobile source and a mobile observer Simulation Play

A mobile source and a mobile observer Student activity Play

A mobile source and a mobile observer Whiteboard exercise Play

A mobile source and a mobile observer Animation Play

A mobile source and a stationary observer Student activity Play

A mobile source and a stationary observer Simulation Play

A mobile source and a stationary observer Whiteboard exercise Play

A molecule emitting a quantum of radiation Whiteboard exercise Play