This essay describes the influence that the pendulum had on Galileo's thinking and science. It also discusses the use of a pendulum to measure time. This is a part of The Galileo Project, an extensive web site on the...

This National Aeronautics and Space Administration (NASA) feature presents a discussion with country music star Clint Black describing how both a guitar and the space shuttle rocket and spacecraft resonate. The air...

This site, created by Evil Mad Scientist Laboratories, shows you how to make a simple electronic BristleBot. The BristleBot is a simple and tiny robot with an agenda. The ingredients? One toothbrush, a battery, and a...

This webpage, from Hyperphysics, describes a pendulum and provides a formula for its period. The page includes a calculator to obtain the period from the pendulum's length and the acceleration of gravity.

This animated gif illustrates the changing voltages a conventional inverting amplifier when it receives input from a current source rather than a voltage source. Notice that the input resistor does not offer any...