A system is a group of parts that can be considered one unit. Storm systems, ecosystems, and our bodies are natural systems. Cars and houses are human-made systems. Choose an example of a system, and analyze the energy flow through the system. Describe in detail how energy enters the system, how energy changes form while in the system, and how energy leaves the system.

electrical work - charges moving due to a potential difference. heating - due to temperature difference caused electrically or by chemical reaction. radiation - energy transferred as a wave, eg light and infrared - the Sun emits light radiation and infrared radiation.

energy is transferred to or from a system by three forms: heat, work and mass flow. ... Heat transfer to a system (heat gain) will cause the internal energy of the system to increase, and heat transfer from a system (heat loss) will cause the internal energy of the system to decrease.

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elastic potential energy