Tensile strength is the largest amount of force that can be applied to an object being stretched or pulled until it breaks. Tensile strength can be a useful property of a material. For example, fishin ...
Windmills are machines that convert energy from the wind into useful work by rotating. The rotation of a windmill often powers a motor or generator used to produce electricity or mechanical work (movi ...
An engine is a machine used to transform one kind of energy into another to produce work. In this project, we'll learn how to make a rubber band heat engine, a type of engine that converts thermal ene ...
Periscopes were invented to observe things from a hidden position. They were used to see above water from submarines, in all directions from inside a tank, and above ground from trenches by soldiers d ...
A pulley is a mechanical device that can be used to lift heavily objects more easily. Pulleys consist of a wheel that rotates on an axle—which is a rod through the center of the wheel—and a rope, cabl ...
Newton’s First Law of Motion states that when an object is set in motion, it will remain in motion until acted on by an outside force. Theoretically, this could mean you could travel at the same speed ...
What is a wedge? Wedges are triangle-shaped objects or tools that can be used to make work easier. The small pointed end (which can often be blunt, not sharp) can be used to lift and separate objects. ...
The sun is a wonderful (and free) source of energy just waiting to be harnessed. You can build a simple solar hot dog cooker for use on a sunny day.This hot dog cooker uses a reflective parabola. A pa ...
Energy is stored in the bonds of molecules. When these bonds split apart, the energy released can be used to do work. Breaking apart liquid water molecules into hydrogen and oxygen gas creates an enor ...
Energy is neither created nor destroyed: it is only transformed. There are many different forms of energy, including kinetic energy (the energy of motion), potential energy (energy that is considered ...