Energy stores and systems

What are the main types of energy stores?

Kinetic, thermal, chemical, gravitational potential, elastic potential, nuclear, internal.

Define energy transfer.

The movement of energy from one place to another (e.g., mechanical, electrical).

How is energy transferred in a lamp?

Electrical energy is transferred into light and heat energy.

What is an energy system?

A collection of energy stores and energy transfers.

How do you calculate energy in the kinetic energy store?

KE = 0.5 mass velocity² (Joules).

What is an example of a closed system?

A thermos flask (energy does not enter or leave the system).

Which energy store is involved in a stretched rubber band?

Elastic potential energy.

What is meant by the conservation of energy?

Energy cannot be created or destroyed, only transferred or transformed.

How is energy lost in a car engine?

As thermal energy due to friction and inefficiencies.

What is the unit for energy?

Joules (J).