History of the Universe eBook. 398 pages, 300 illustrations only $2.99
PressurePressure is felt when a gas or other substance is squashed. Pressure is measured by working out the force on a unit of area of the surface of the substance.
History of the Universe eBook. 398 pages, 300 illustrations only $2.99 |
eBook only $2.99 398 pages, 300 images ![]() "I find the science fabulous...an extremely useful teaching tool." Professor David Christian Become a Citizen of the Universe ![]() and get your free badge! Follow @WykenSeagrave |