Symbols for stored and unstored energy

What is the symbol for energy?

The common symbol for energy is the uppercase letter E. The standard unit is the joule, symbolized by J. One joule (1 J) is the energy resulting from the equivalent of one newton (1 N) of force acting over one meter (1 m) of displacement. There are two main forms of energy, called potential energy and kinetic energy.

What are the different types of energy stores?

There are different types of energy stores, including: Thermal energy is stored in hot objects, which results from the movement of particles within a substance. As the temperature of the substance increases, so does the vibrational motion of its particles, leading to an increase in its thermal energy. Kinetic energy is stored in moving objects.

What is a Sankey diagram?

Total energy in, wasted energy and useful energy out shown on a Sankey diagram Total energy in = Useful energy out + Wasted energy Sankey diagram for modern vs. old filament light bulb An electric motor is used to lift a weight. The diagram represents the energy transfers in the motor.

What are the units for energy?

The units for energy are Joules, and the symbol J was named after the well-known physicist James Joule. However, you should not be confused by definition - energy is used everywhere. For example, when you burn wood, the stored chemical energy in the wood is converted into thermal energy in the form of heat to keep you warm.

What are the 7 main stores of energy?

There are 7 main stores of energy: Kinetic, elastic potential, gravitational potential, electrical, magnetic, nuclear and internal energy (which includes heat and chemical energy). Only 7 types of energy can be stored.

What makes an object store electric energy?

Certain objects can store electric energy. These objects must be charged. The more GPE an object gains as its raised higher, the faster it will fall back down to Earth. So GPE is converted into kinetic energy.