A ball of mass m and radius r rolls at speed v into a spring with constant k. How much does it compress the spring?.

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current