When a light switch is turned on, electrical energy runs through the wires and is transferred to the bulb where electrical energy is converted to light and heat energy. This is an example of energy transfer. When a bowli... More »

Energy transfer describes energy in some form, usually heat or electricity, being transferred from one object or substance to another. There are natural examples of energy transfer like the sun heating up land, and also ... More »

Energy is transferred through conduction, convection or radiation. There are many forms of energy, but these are the only three ways in which energy is transferred to another object. More »

An incandescent light bulb emits 90 percent of the energy it uses as heat. Thus, a 75-watt light bulb produces 68 watts as heat. Most of the power used goes to heating up a tungsten filament, which glows at 4,600 degrees... More »

To install a light switch, remove the old switch from the wall, disconnect the wires, and reconnect them to a new switch. Before beginning this process, disconnect the electricity at the electrical panel, and test the sw... More »

The laws of motion and mass, as well as conservation and transfer of chemical, elastic and kinetic energy, are some of the physics concepts demonstrated with a toy slingshot. Use of the slingshot also demonstrates how va... More »

Actuators depend on transfer of energy – via electricity, hydraulic pressure, human muscle or otherwise – to perform mechanical work that sets a system in motion or controls it. Actuators can be mechanical systems, such ... More »