Phil introduces the concept of electromagnets and explains the difference between them and regular magnets. He then demonstrates how to create a DIY electromagnet.
Phil demonstrates potential and kinetic energy using an old traffic controller and a bagel. He explains the difference between the two types of energy.
Buster Beaker explains how high and low tides are affected by the gravity of the moon and the sun. He illustrates the phenomenon using a cookie, a mushroom, and a lemon.