Tag: #physics

Coulomb’s law describes the force between charged particles, which is proportional to the product of their charges and inversely proportional to the square of the distance between them. 2017-01-25

Electric current measures the change in electric charge across a boundary, like a wire. It is measured in amperes (coulombs per second) and reflects the net movement of electrons and protons from one side of the boundary to the other. 2017-01-19

Electric charge is the number of electrons minus the number of protons in an object. 2017-01-18

IP packets travel at ~20% the speed of light, with most time spent in routers rather than on the wire. 2017-01-01

Phone screens have low contrast in sunlight because the reflected sunlight overpowers the screen’s own light output, reducing the effective contrast ratio. 2014-08-09