This A-level tutorial video follows on from the the distance, speed and time video.  It looks at the terms displacement and velocity and how they differ from speed and time.  An example of a displacement / time and velocity / time graph is given and discussed.  A...

With this a-level video tutorial, the presenter talks about how we get the equation speed = distance / time and then looks at the differences between a distance / time and a speed / time graph.  It also demonstrates what the area under the graph represents as well as the gradient.  This can be followed by the...

This video asks people if they believe cell phones can cause cancer.  It then considers the available evidence logically, that is types of radiation emitted by a cell phone (non-ionising) and the power rating to conclude that the radiation should not be harmful. However, recent evidence suggests that heat-shock...

This video demonstrates how applying pressure to ice melts it, yet on removal of the pressure the ice re-freezes.  This is called regelation.

This kit and their associated resources are designed to help teach about double-slit and diffraction patterns.

Before teaching this, students should:

• be familiar with constructive and destructive interference;
• be aware that we get diffraction when a wave travels through a gap;
• ...

This video uses a comparison between an LED light and filament bulb to introduce efficiency (η). 

The equation, %efficiency (η) = (useful energy out/total energy in) x100 is explained and then linked to rate of energy transfer (P=E/t).

A simple and effective practical demonstration of inertia using a spinning raw egg.

When the egg is spun its contents also spins.  Momentarily stopping the egg does not stop its contents from spinning.  On release the egg begins to spin again. The contents of the egg resist any change in its motion.

...