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Energy is an amount of the ability to do work, or of the work done. It does not have a time element. Power is the rate of expenditure of energy, it is an amount of energy per second, or other unit of time. In the SI system, energy is measured in Joules and power in Watts. In the footpound system often used in the US, but superseded by SI in most other places, energy is in units of ft.lbforce or BTU, whilst power is in horsepower.
In electrical engineering, power is in Watts or Kilowatts or Megawatts, to get an amount of energy over a period of time you generally introduce an hour as the unit, so that electrical energy is in kilowatt.hours, or other multiples depending on the application.
What else can I help you with?
What different between power and energy?
Power is the rate of doing work or delivering energy whereas energy is the capacity for doing work.
What are different types of alternative energy sources?
Wind Power, Geothermal Energy, Hydroelectric Energy
Is a nuclear power station an example of chemical energy?
No. Nuclear energy is a type of energy that is quite different from chemical energy.
What is alternative enery?
A different source of energy such as methane wind power and hydroelectric power
What are three types of green energy?
Solar Power, Wind Power and Geothermal are three different types of green (renewable) energy.
How power plants work?
A power plant turns different types of fuels into other forms of energy. This energy powers the turbines. The turbines create the electricity. Different fuels make different kinds of electricity.
What are the different types of power?
hydroelectricity solar energy tidal power oil power wind power coal power nuclear power
Is energy power from the sun?
Not quite. First, there are many different types of energy. Most of the energy sources we have on Earth come directly or indirectly from the Sun; a few don't. Second, energy is not the same as power. Power refers to energy transfer per unit time.
What is the conversion from joules of energy to watts of energy?
Power (watts) is a measure of energy transfer over time, while energy (joules) is a measure of total work done. The formula to convert energy in joules to power in watts is: Power (watts) = Energy (joules) / time (seconds).
What does power supply do?
A power supply does not create power or energy. This would be in violation of the Law of Conservation of Energy. Rather, a power supply changes the form of an available source of power or electrical energy into a form that is acceptable for use by electrical or electronic equipment. The input form is electrical energy defined by voltage or current or power, with a given impedance level, and frequency. The output form from the power supply is a different voltage or current or power, with a different impedance level, and possible a different frequency. Another possible is for the input and output to be of the same form but electrically isolated from each other for safety and performance concerns.
How is solar power and wind power different?
Solar power uses photovoltaic cells to convert sunlight into electricity, while wind power uses turbines to convert the kinetic energy of wind into electricity. Solar power is dependent on sunlight, whereas wind power is dependent on wind speed and consistency. Both are renewable sources of energy, but they rely on different natural elements for generation.
Is wind power a type of solar energy?
Wind power is not a type of solar energy. Wind power is generated by harnessing the kinetic energy of moving air, while solar energy is derived from capturing sunlight and converting it into electricity. Both are forms of renewable energy, but they are distinct sources with different mechanisms of generation.
