Explains how much power is needed to accomplish a task in a specific time. Uses efficiency and power to find the power rating of a motor for a specific application.

Explains how much power is needed to accomplish a task in a specific time. Uses efficiency and power to find the power rating of a motor for a specific application.

Learn how to calculate the total magnification of a microscope on this concise site. Links to making a slide, questions on the use of the microscope, and other related microscope topics are included on this site.

This site from the University of St. Andrews provides a short, but useful, biography on Konrad Zuse. Konrad Zuse created mechanical and electromechanical machines to do calculations at around the same time as Babbage's machine.

A photo of an abacus. Also known as a counting frame, the abacus has been an important tool for making calculations for thousands of years, and is still used in many places today. This particular example is a Russian abacus.