Power vs Energy: What's the Difference?

In summary, power is the rate at which work is done on a system, while energy is the quantity changed within a system when external work is done on it.
  • #1
Imparcticle
573
4
What is the difference between "power" and "energy" if there is one?
Is power a state of energy where it is being used?
 
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  • #2
Look them up in the dictionary!

Power is the rate at which work is done... ie how fast energy is transferred from one type to another.
 
  • #3
Adrian Baker said:
Look them up in the dictionary!

Power is the rate at which work is done... ie how fast energy is transferred from one type to another.

Yes, power is the work done in unit time.
P=dW/dt
 
  • #4
What is the difference between "power" and "energy" if there is one?

Not to be coy, but I find it hard to believe that you've posted over 300 times on this site without knowing the difference between power and energy. Energy is simply a quantity changed within a system when external work is done on it, and power is the rate at which this work is done on it.
 

1. What is the difference between power and energy?

Power and energy are closely related concepts but are not the same. Energy is the ability to do work or cause change, while power is the rate at which energy is transferred or used.

2. How are power and energy measured?

Power is measured in watts (W) or kilowatts (kW), while energy is measured in joules (J) or kilowatt-hours (kWh).

3. Can an object have high power but low energy?

Yes, an object can have high power but low energy. For example, a light bulb may have high power (100 watts), but it does not store energy and therefore has low energy.

4. What are some examples of high power and high energy systems?

Some examples of high power and high energy systems include a car engine, a power plant, and a rocket engine.

5. How are power and energy related in everyday life?

Power and energy play a role in our everyday lives. For example, when we turn on a light bulb, we are using energy (electricity) to power the light. Similarly, when we use a phone or computer, we are using power (from the battery) to access energy (stored data).

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