Energy stores Flashcards
(20 cards)
What is a store of energy?
A system where energy is kept and can be transferred or transformed
Name the 8 main energy stores.
Kinetic, gravitational potential, elastic potential, chemical, thermal, nuclear, electrostatic, magnetic.
What is kinetic energy?
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Energy an object has due to its motion
What is chemical energy?
Energy stored in chemical bonds.
What is thermal energy?
Total internal energy due to the movement of particles.
What is nuclear energy?
Energy stored in an atom’s nucleus, released in nuclear reactions.
What is electrostatic energy?
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Energy stored in electric charges
What is magnetic energy?
Energy stored in magnetic fields.
What is the formula for kinetic energy?
E(k)=1/2xmxv^2
How can energy be transferred?
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Through work, heat, or radiation.
What is work?
Energy transferred when a force causes movement.
What is radiation?
.
Energy transferred through electromagnetic waves
What is efficiency?
.
The ratio of useful energy output to total energy input
What happens if a system is not efficient?
Some energy is lost as waste, often as heat.
What is electrical energy transfer?
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Energy moved via electrical currents
What is mechanical energy transfer?
Energy transferred through the motion of objects.
What are renewable energy sources?
Sources that are naturally replenished (e.g., solar, wind).
How does energy transfer through convection?
Energy transfer via fluid movement (liquids/gases).
How does energy transfer through conduction?
Energy transfer through direct contact in solids.
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed.
