IntroductionOne Wednesday night in physics class, my professor stated that “power and energy are not the same thing.” This became an interesting topic for me not because I disagreed, but because I overused the terms. You may have heard people use the terms "power" and "energy" in near duplicate, just because they don't understand the facts about what these things actually are. Power and Energy – There is a difference. What's the difference? In this article I want to explain that in the world of physics, power and energy go hand in hand, but they are not the same thing. There is a difference and a simple explanation. What is energy? Energy is defined as effort; ability to carry out work; the resources to produce that energy (Merriam-Webster 1999). The authors (Kilpatrick and Francis, 2010) wrote that “energy is one of the most fundamental and far-reaching concepts in the worldview of physics” (p. 116). These authors also state that it is not easy to give a precise definition of energy. After long hours of research and reading many definitions of energy. I liked the definition that Professor Whitlock gave in class: “energy is the ability to do work and work is the change in energy”. In a simpler term, energy is the ability to change things. We have often used the term energy freely. For example, you may have heard someone say that eating a big meal gives you energy or that my three-year-old has a lot of energy. Did you know that even a bouncing ball, a liter of gas or a lit fire have energy? I didn't either until I fully understood the concept of energy. Since energy is the ability to change things, it can change the temperature, the shape, the speed, po...... middle of the paper...... the measure of how long it can maintain production of energy. Power is the rate at which energy is converted. Whenever energy changes shape or moves from one place to another, the speed at which it makes those changes is power. Summary What I have learned is that energy and power are not the same thing. The Watt is a unit of power equal to one Joule of energy converted every second. Energy is what you supply and power is how fast it is supplied. References Danish Wind Industry Association. Retrieved April 19, 2011, from http://www.windpower.org/en/stat/unitsene.htm Kirkpatrick, L. & Francis G. (2010). Physics: A conceptual worldview (7th ed.). Energy (pp. 115-134) CA: Brooks/Cole.Merriam-Webster. (1999). Webster's New Explorer Dictionary (pp. 172, 408). Springfield, MA: Federal Street Press.