Energy and sankey diagrams

• Energy cannot be created or destroyed; it can only be transferred from one place to another
• total energy input = total energy output
• energy is measured in joules (J)
• energy efficiency is how good something is at transferring energy input to output
• gravitational potential is anything within a gravitational field that has mass
• kinetic energy is stored in anything that is moving, whereas potential is stored in anything that is not moving
• thermal is in all objects and depends on heat
• elastic potential is any object that is being stretched or compressed
• chemical is anything that can transfer energy by chemical reaction
• nuclear is the energy stored in the nucleus of an atom
• electrostatic is anything with electric charge interacting with another electrically charged object
• magnetic is the energy stored when poles of a magnet are brought together
• an example of gravitational potential is a book on a high shelf
• an example of kinetic is a person running
• an example of thermal is a hairdryer
• an example of elastic potential is a rubber band
• an example of chemical is food or batteries
• an example of electrostatic is rubbing a balloon on hair
• electrical energy pathway transfers energy in a circuit due to charges moving
• mechanical energy pathway is when force is used on an object so mechanical work is done
• radiation energy pathway gives out energy from a source
• heating energy pathway transfers energy from hotter to colder objects
• joules can be abbreviated as J
• 1 Joule = 1000 milli Joules
• 1 kilo Joule = 1000 Joules
• a sankey diagram is a diagram drawn to show the flow of energy through a system
• in a sankey diagram useful energy goes to the right and wasted energy goes down