These may not be our most "Frequently Asked Questions," but they ought to be, because power and energy are Frequently Confused Concepts. Power is the rate of energy release at a given instant in time-how much energy is released per unit time at that instant. Energy is power integrated- added up-over time. Power is measured in watts, kilowatts, and horsepower. Energy is measured in joules (watt-seconds) or kilowatt-hours.

A They are both measurements of heat output. To convert from Watts to BTU, simply divide by 0.293. To convert BTUs to Watts multiply by 0.293

A watt is a unit of power. A kilowatt is a thousand watts. A watt-hour is a unit of energy or power over time. A 100-watt light bulb used for one hour uses 100 watt-hours. A kilowatt-hour is a thousand watt-hours. The electricity you purchase is measured in kilowatt-hours (kWh). An average home in NY uses about 6600 kWh per year.

that constant current which, if maintained in two straight parallel conductors in infinite length, of negligible circular cross section, and placed 1 meter apart in a vacuum, would produce between these conductors a force equal to 2x10^-7 newton per meter of length." joules per coulomb) The electromotive force required to drive a steady current of 1 ampere through a resistance of 1 ohm

Power is the rate of doing work. It is an instantaneous quantity, measured in watts. A watt is 1 joule per second. Energy is power over a period of time. It is measured in watt-seconds, but that unit is too small for everyday use, so the unit kilowatt-hours is more commonly used. Note this is a controversial subject - not because there is any disagreement, but because some people are either lazy, uninformed or misinformed and misuse the terms.

This applies to GaAs lasers. When a GaAs laser works in a pulsed fashion, the laser light power varies between the peak pulse output power and zero. Then usually the laser's average power output is of importance, especially in terms of dosage calculation. The peak pulse power value is of some relevance for the maximum penetration depth of the light. Some manufacturers specify only the peak pulse output in their technical specifications.

Energy is the amount of work that can be done. Power is the amount of work that is done over a specific time period. In other words, power measures how fast energy is transferred. Power is measured in watts (W), energy in Joules (J). A low ESR supercapacitor can deliver much higher power than traditional memory back up product such as Panasonic's Gold Caps.

Running watts are the continuous watts needed to keep items running. Starting watts, are extra watts needed for two or three seconds to start motor-driven products like a refrigerator or AC unit.

W” indicates actual power consumption, while “VA” is potential power. The electricity used by electrical appliances when they are actually working is called power consumption (W).

The running watts of a generator equals the amount of power the unit can produce continuously, while the starting wattage is the additional power that the generator can produce for short rentalperiods of time to start items in your home that require larger amounts of electricity for initial start-up than when they are running.

When you buy retail green power you are purchasing electricity that goes into your regional electricity grid. When you buy a REC, you are purchasing the environmental attributes associated with the generation of green power, illustrated in a certificate, but not the actual electricity itself. With a REC, the electricity that produces these environmentally friendly attributes can be generated from anywhere in the country.

It is a unit of work or energy equal to that done by one kilowatt of power acting for one hour. A kilowatt is 1,000 watts or 1.34 horsepower.

energy drink contains a significant amount of carbohydrate; this is going to reduce the hydration benefits of that drink. A recovery drink will not provide rapid energy absorption and hydration in the way that you would need during an event. The best recovery drinks actually encourage the release of insulin to stimulate maximum glycogen rebuilding - which can reduce the amount of energy that is available in the blood short term.

There actually isn’t much of a difference between work and energy. In order to do work, an object must have energy, and in order to have energy, an object must have work done to it.

You can get 1000 watts of output power by connecting across 2 phases of a 3 phase supply (normally 208 volts).

Watts are units of power measured over one second. If one watt of electric power is used for one hour, the total volume of power consumed is expressed as one watt hour, or 1Wh. Similarly, 1,000 watts of power is expressed as one kilowatt (1kW) and 1,000 watt hours as one kilowatt hour (1kWh). If a 2kW system produces power continuously for five hours, the total volume of power generated is expressed as 10kWh.