Energy and Efficiency Flashcards
Most Kids Hate Learning GCSE Energy Names
Most Kids Hate Learning GCSE Energy Names. Each capital letter is the first letter in the name of a type of energy: Magnetic - Energy in magnets and electromagnets. Kinetic (movement energy) - Energy in moving objects. Heat (Thermal Energy) - Energy in hot objects. Light - Also called Radiant Energy. Gravitational potential - Stored energy in raised objects. Chemical - Stored energy in fuels, food and batteries. Sound - Energy released in vibrating objects. Electrical - Energy in moving charges or static electric charges. Elastic potential - Stored energy in stretched or squashed objects. Nuclear - Stored in the nuclei of atoms.
What is the difference between a Sankey diagram and an Energy Transfer diagram?
Energy transfer diagrams only show the useful energy transfers. A Sankey diagram shows the total energy input, the useful energy and wasted energy.
State 2 facts about energy.
Energy can be transferred usefully, stored or dissipated. It cannot be created or destroyed.
What is the efficiency of a device?
The efficiency of a device is the proportion of the energy supplied that is transferred in useful ways.
How do you calculate efficiency?
efficiency = useful energy out ÷ total energy in (for a decimal efficiency) Note that the efficiency of a device will always be less than 100 percent.
How do you calculate the amount of electrical energy transferred to an appliance?
E = P × t E is the energy transferred in kilowatt-hours, kWh P is the power in kilowatts, kW T is the time in hours, h.
