Useful and Wasted Energy

Just like everything else, you can find something useful, or you can find it useless. In the case of energy, it can either be used, or be wasted.

• Useful energy is energy that is used in the way it wants to be used. E.g: A light bulb's useful energy is light.
• Wasted energy is energy that is being used, but you don't want it to be used in that particular store-you want it all to be used in the way you want it used. E.g: A light bulb's wasted energy is heat. You don't want heat being produced-so that's why it's being wasted.
• When energy is transferred, some energy will always be transferred to a different store, like the bulb example.
• Dissipated energy is another word for wasted energy
• Friction causes wasted energy.
• Useful energy eventually spreads out/transferred to the environment. Wasted energy always gets transferred to the things around it/surroundings.
• Energy starts to become useless the more that it is dissipated.