Power can also expressing as the number of joules per second. One watt is equal to one joule per second (J/s). 1 horsepower equals 746 watts in the United States, but it may actually equal 735 watts. Power can define as the rate at which work or energy is transferring or converted. It is using to measure power outputs, especially electric power. He lived during the late 18th and early 19th ccenturies The watt is one of the base units in the International System of Units (SI). Watt is named after James Watt, the Scottish inventor who was instrumental in getting steam engines to work efficiently. If you have an appliance that uses 100 watts per hour but only operates for five minutes a day, then this appliance would use 5 x 5 = 25 watts a day. If you have an appliance that uses ten watts per hour, but you only use it for twelve hours per day, it will use 120 watts per day. So if your washing machine operates for fourteen hours a day, it uses about thirty-two watts of electricity each hour. How many watts does the appliance use per day? Finally, multiply this number times twenty-four hours: 1.12 x 24 = 28.8 Watts How many watts does it use a day? Now multiply this number times how many days you will be using it: 0.14 x 7 = 1.12Ħ. How many watts does it use per hour? The washing machine uses 200 watts per hour, so thatyou would divide the total time by one hundred: 14 / 100 = 0.14ĥ. How many days will you use it? Let’s say that you have a washing machine set to wash clothes once a week, so you multiply how many days by how many hours: 7 x 1 = 7Ĥ. How many hours per day will you use it? For instance, if you have a washing machine set to wash clothes every evening at 7 pm, for two hours a day, the washing machine would use 7 x 2 = 14 hours per day.ģ. Check the wattage of the appliance on a label or decal, and write down this figure (for example: 200W).Ģ.
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