Energy Flashcards
When energy is transferred to an object where is the energy stored?
One of the objects energy stores.
Give the 8 energy stores.
Thermal energy stores Kinetic energy stores Gravitational potential energy stores Elastic potential energy stores Chemical energy stores Magnetic energy stores Electrostatic energy stores Nuclear energy stores
How is energy transferred?
Mechanically by a force doing work
Electrically when work is done by moving changes
Heating
Radiation (light and sound)
Define the term system.
A single object or a group of objects that your interested in.
What happens when a system changes.
Energy is transferred.
It can be transferred into or away from the system between different objects in the system or between different energy stores.
Define the term closed system.
Neither matter nor energy can enter or leave.
The net change in the total energy of a closed system is always 0
How does boiling water in a kettle work?
Water is the system, energy is transferred to the water from the kettles heating element by heating into the waters thermal energy store causing the temperature of the water to rise.
How is the kettle a two object system.
Kettles heating element and the water together as a two object system.
Energy is transferred electrically to the thermal energy store of the kettles heating element.
This transfers energy by heating to the waters thermal energy store.
