Physics


Interconversion of Energy

Energy conversion, the transformation of energy from forms provided by nature to forms that can be used by humans.Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy converters are quite simple. The early windmills, for example, transformed the kinetic...

Understanding the Importance of Conserving Electricity

As you look for ways to lower your home energy usage, you may ask, “Why is it important to conserve electricity?” Besides saving money on your energy bills each month, there are a number of reasons why conserving electricity is a good idea.   What It Means to Conserve Electricity...

Thermal Physics and Kinetic Energy

The Kinetic Theory of Matter states that matter is composed of a large number of small particles—individual atoms or molecules—that are in constant motion. This theory is also called the Kinetic-Molecular Theory of Matter and the Kinetic Theory of Gases. By making some simple assumptions, such as the idea that...

Mechanics

Mechanics, science concerned with the motion of bodies under the action of forces, including the special case in which a body remains at rest. Of first concern in the problem of motion are the forces that bodies exert on one another. This leads to the study of such topics as...