Watts (to sign the W) sensing power in the international system of units. A watt equals a joule of energy per second. Watts expresses the song, the consumption or production of energy.

track the consumption of electrical energy in light bulbs, normal, 15 to 100 watts. Bulbs intensive consumption between 5 to 30 watts. The engine of a car is typical with track 25000 watts of mechanical energy production. Be a the main formula is always the same.