Theodore Maiman used this gem in producing the world's first laser in 1960
In 1938 Otto Hahn & Fritz Strassman discovered nuclear fission by splitting atoms of this element
After trying to measure this with signals between himself & an assistant, Galileo decided it was infinite
This represents the direction and the magnitude, by the arrows length, of certain quantities
(Jimmy and Sarah of the Clue Crew pull on cords of different thicknesses.) Seven letter word for the type of strength, based on the cohesion of molecules, that varies in different materials
Its the point of maximum velocity in a pendulums swing
The zeroth law of this says 2 bodies each in thermal equilibrium with a 3rd are in thermal equilibrium with each other