Prior to advances in x-ray scattering technology, creativity and mathematics were the tools used to estimate the size of atoms. As it turns out, the accuracy of such estimates was best when information about solids was used in calculations. Since solids and liquids can only be compressed to a negligible extent, we are at libertyContinue reading “SOLIDS: The Size of Atoms”
Tag Archives: neutron
ELECTROSTATICS: A Charged Particle Suspended in Space
Q: A particle with a positive charge ( q1 = +45 nC ) maintains a fixed position beneath a second particle ( q2 ) with an unknown charge. The second particle ( q2 ) has a mass = 7.5 μg, and it is floating 25 cm above charge q1. The net force on q2 isContinue reading “ELECTROSTATICS: A Charged Particle Suspended in Space”
ENERGY AND MOMENTUM: Subatomic Collisions, Billiard Balls, and the 90-Degree Rule ( Part 1 )
An elastic collision, within which kinetic energy ( KE ) and momentum ( p ) are conserved, is mathematically modeled in terms of momentum as follows: pi = pf , and m1v1i + m2v2i = m1v1f + m2v2f where p = mv, and m = mass in kilograms ( kg ), and velocity ( vContinue reading “ENERGY AND MOMENTUM: Subatomic Collisions, Billiard Balls, and the 90-Degree Rule ( Part 1 )”
RENAISSANCE PHYSICS 