Learn the difference between distance, displacement, speed and velocity, and how to calculate distance, speed and acceleration.

Key fact The gradient of speed-time and velocity-time graphs represent acceleration. The area under a speed-time graph represents the distance travelled.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Essentially all cells in an organism's body have the same genetic blueprint, or genome, but the set of genes that are ...