Why does wearing wellies result in feeling pressure in a puddle, when going barefoot...
Answers to Physics Questions
Physics, cosmology, astrophysics, electricity, energy, forces, gravity, light and maths...
06 February 2011
Is sending an e-card more environmentally friendly than sending one made from trees?
23 January 2011
If light has no mass, and gravity is a property of mass - then how is light bent by gravity?
06 December 2010