problem Favourite Escape from planet earth Age 16 to 18 Challenge level How fast would you have to throw a ball upwards so that it would never land?
problem The ultra particle Age 16 to 18 Challenge level Explore the energy of this incredibly energetic particle which struck Earth on October 15th 1991
list Fundamental particles collection Age 16 to 18 Challenge level A collection of problems related to the mathematics of fundamental physics.