6/26/2019 24 Comments Calculadora De Watts Para PcKWh to watts calculator Watts to kWh calculation. The energy E in kilowatt-hours (kWh) is equal to the power P in watts (W), times the time period t in hours (hr) divided by 1000. The best power supply for your PC build is the one that provides the right amount of wattage to all components simultaneously. Manually calculating this requires that you multiply the total amps of all components by the total volts of all components. The result is the total watts that your PC build requires.
The power output of this GO Train locomotive MP40PH-3C made by Motive Power (Wabtec) is 4000 hp or 3000 kW. It can pull 12 cars with 1800 passengers.
OverviewPower in physics is the ratio of work to time. Here work refers to the amount of force F needed to move a body along the distance s. It could also be defined as the speed of energy transfer. In other words, power is an indicator of the machine’s capacity to do work.
2 hp or 1.5 kW horse-drawn wagon with 20 passengers
UnitsPower is measured in joules per second, or watts. Along with watts, horsepower as a unit is also used. Until the invention of engines, power was not measured formally, and there were no units associated with it. After the steam engine was invented, James Watt, an inventor and an engineer, worked on improving it and on making it more efficient. Power is one indicator of efficiency — if a given engine is modified and its power output increases, so does its efficiency. To show efficiency of the improved engine Watt suggested horsepower as a unit of power. Until the invention of engines, humans relied mainly on human and animal manual labor, so it was natural for Watt to compare the power output of the new steam engine with the power of horses, especially because not every mine where he marketed his steam engine used technology; some used only horses. Thus, having a standardized measure was useful for comparing the power output between different engines and horses. This measure was later used for other machines such as automobiles. Watt measured this unit of power by observing and evaluating the work of draft horses in a mill. One horsepower is equivalent to 746 watts. It is now believed that horses are not capable of working at this capacity for a long period of time, but the unit stays unchanged. Even though watts as a unit have existed nearly as long as horsepower, the latter is more commonly used in automobile industry. Power of Household AppliancesHousehold appliances generally have their power indicated on them. Light fixtures sometimes allow only light bulbs of or below a certain power, for example 60 watts. This is because light bulbs with greater power may damage the lamp or the fixture due to heat they produce. In household lighting this problem may be solved by using lamps that are not incandescent, as those generally consume considerably less power for the same brightness output. Most manufacturers are working on improving the efficiency of appliances, as well as light bulbs. Brightness or luminosity of a light bulb depends on power and on the type of bulb. It is measured in lumens. Below is a comparison of power of different light sources for home use, with luminous power information.
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