It measures the rate of energy transfer. A watt equals a joule per second. If a smart phone uses five joules of energy every second, then the power of the phone is five joules per second, or five watts. The animation above demonstrates the difference between energy and power. Each slide in the animation will transfer energy at different rates for five seconds. If each child represents one unit of energy, which slide has the highest power? This animation is featured in our Energy e-book series.
Click on the thumbnails below to download our free e-books or subscribe to our iTunes U course. The analogy continues with the jug having a smaller power output but more energy. The mug releases all its water energy very quickly. Conversely, the jug holds much more water energy , even if it is not losing it quickly.
Fossil Fuels. Nuclear Fuels. Acid Rain. Climate Change. Climate Feedback. Ocean Acidification. Rising Sea Level. What is the difference between power and energy? Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Key Differences Between Energy and Power The points provided below explain the difference between energy and power: Energy can be defined as the capacity of the object to perform work.
On the other hand, power implies the rate at which work is done upon an object. Energy indicates how much work a person can do? Energy can be measured in terms of Joules, which is equal to watt-seconds. As against this, power is expressed in terms of Watt, which equals Joules per second. Energy is indicated by W, while power is indicated by P. Energy is neither generated nor destroyed; it is only turned from one form to another.
On the contrary, power cannot be transformed from one form to another. Conservation of energy is possible. However, power cannot be stored. Comments Cool. Leave a Reply Cancel reply Your email address will not be published.
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