This refers to the total amount of kinetic and potential energies present within a given system at any point in time. It's known as a state function because it only depends on the current state of the system, not how it got there.
Imagine you're riding on a roller coaster. At different points during your ride, you'll have varying amounts of potential (like when you're at the top of a hill) and kinetic energies (like when you're speeding down). But no matter how many loops or turns you take, your total energy (the sum of potential and kinetic energies) remains constant throughout your ride.
Thermal Energy: The internal energy present in a system due to its temperature.
Mechanical Energy: The sum of potential and kinetic energies related to motion or position.
Conservation Of Energy Principle: States that energy cannot be created nor destroyed but can change from one form into another.
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