There are many things that can cause a portable generator to break down. Testing it once a month, whether it is being used or not, allows time for troubleshooting problems and repairs. Become familiar with parts that req... More » Science Physics Thermodynamics

Portable generators with electric starts use a 12-volt battery to start their engines. The batteries must be at a full charge to have enough power to start up the generator. When a generator is out of use for a long time... More » Home & Garden Home Maintenance Electrical

If you live in an area where power outages are common, installing a portable generator provides emergency backup power. While it is possible to power lights using extension cords, hardwiring with a transfer switch is oft... More » Home & Garden Home Maintenance Tools

According to the Department of Energy, a wind turbine uses the force of the wind to spin propeller blades, which in turn spin an electric generator to produce current. Inside the generator, a coil of wire moves through a... More » Science Physics Thermodynamics

In a hydroelectric power plant, a large volume of water flows down a slope to turn a turbine, which turns a metal shaft in a generator, consequently producing electricity. A similar principle applies for geothermal power... More » Science Physics Thermodynamics

A thermos is made from insulating materials that keep hot things hot and cold things cold. These materials are selected to minimize the transfer of heat between different objects or environments. More » Science Physics Thermodynamics

Styrofoam keeps things cold because it is made from polystyrene, a substance known for its low thermal conductivity, which is its ability to transfer heat. Styrofoam also uses millions of microscopic air bubbles as insul... More »