Beer goes with peanuts, wine with cheese. Also, alcohol itself is high in caloriesâ7 calories per gram, almost as much as fat (9 calories per gram) and more than carbs or protein (about 4 per gram). Alcoholic beverages all contain calories, and most of the calories come from the alcohol.
Current and Power and Energy. The unit used to measure the flow of electricity, or current, is the ampere (A). The unit to measure power is the watt (W). Energy is measured in Joules (J). Amperes are really a measure of a rate of electron flow (electrons per second), or equivalently, how much charge is passed per second (Coulombs per second). 1 A = 1 Coulomb per second, and 1 electron has a charge of 1.602 * 10-19 Coulombs.
Power is the rate at which energy is transferred. It is not energy but is often confused with energy. The watt is the most commonly used unit of measure for power. It measures the rate of energy transfer. Click on a scenario number above to begin the interactive explainer. A watt equals a joule per second. If a smart phone uses five joules of energy every second, then the power of the phone is five joules per second, or five watts. The animation above demonstrates the difference between energy and power. Each slide in the animation will transfer energy at different rates for five seconds.