Energy stores and systems

Energy never used up, instead transfered between different energy stores and different objects.

when energy transfered, energy stored in objects energy stores

Energy stores;

• Thermal
• Kenetic
• Gravitational potential
• Elastic
• Chemical
• Magnetic
• Electrostatic
• Nuclear

Energy transferred mechanically (by a force doing work), elecrically (work done by moving charges), by heating or by radiation (e.g. light or sound).

when an system changes, energy is transfered

1) System means single object or a group of objects.

2)When system changes, energy is transferred.

3) Closed systems are systems where neither matter nor energy can enter or leave. The net change in the total energy of a closed system is always zero.

Energy can be transferred by heating or by doing work

work done= another way fo saying energy transferred- they the same thing.

Work can be done when current flows (is done…