Conservation + Dissapation Flashcards
What’s the energy store for a moving object?
Kinetic
The hotter the object is the more energy it has in this store
Thermal
Anything that can release energy by a chemical reaction has energy in this store
Chemical
Anything in a gravitational field (anything that can fall)
Gravitational potential
Anything stretched
Elastic potential
Two charges that attract or repel each other
Electrostatic
Two MAGNETS that attract or repel each other
Magnetic
Atomic nuclei release energy from this store in nuclear reactions
Neuclear
Name all the energy stores.
-Kinetic
-thermal
-Chemical
-GPE
-elastic potential
-Electrostatic
-magnetic
-Neuclear
Energy transfers:
An object moving because of a force acting on it (eg. Pulling/pushing)
Mechanically
Energy transfers:
A charge moving through a potential difference (eg: charges moving round a circuit)
Electrically
Energy transfers:
From a hotter object to a colder one (eg. heating a pan of water on a hob)
By heating
Energy transfers:
Energy transferred by light/ sound waves (eg.energy from the sun reaching earth as light )
By radiation
Name the four main ways energy is transferred
-Mechanically
-Electrically
-By heating
-By radiation
What’s dissapated?
The energy was spread out and lost
What’s the principle of conservation of energy?
Energy cannot be created or destroyed but it can be stored and transferred.
What’s a closed system?
A collection of objects that can be treasured completely differently on its own, without any matter (energy) being exchanged with the surroundings.
How do you calculate total energy input?
Total energy input = Useful energy + Wasted energy
More efficient = ?
Less energy wasted
