In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.
What is the definition of power in science?
Power, in science and engineering, time rate of doing work or delivering energy, expressible as the amount of work done W, or energy transferred, divided by the time interval t—or W/t. A given amount of work can be done by a low-powered motor in a long time or by a high-powered motor in a short time.
What is power and work?
083 - Work and Power In this video Paul Andersen explains how the work is a product of the external force applied to an object or system and the distance it moves. Power is a measure of the amount of work done per unit time. The work can be calculated as the area under a curve in a Force-Distance curve
What is the meaning and importance of power?
It is a relationship between individuals or groups which can make another to act in a way that he may not do otherwise. We can distinguish between power and influence by saying that those who have got power, they can influence the conduct of others more easily than those who do not possess any power.
What is commercial unit of power?
The commercial unit of electrical energy is a kilowatt-hour (kWh). To convert 1kWh into joule. 1kWh = 1000 × 60 × 60. 1kWh = 3.6 × 106 J. The electric energy used in factories, industries and houses which are measured in kWh.
What is the commercial unit of electrical energy relate kWh and Joule?
That's a measure of power. If you use one kilowatt of power for an hour, you have used 1 kilowatt-hour, abbreviated kWh, of energy. One kilowatt-hour is equivalent to the energy of 1,000 joules used for 3,600 seconds or 3.6 million Joules. In equation form: 1 kWh = 3.6 million J.
How do I calculate power?
Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.
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