Overview of Concepts in the Energy unit of grade 11 physics
This is a draft cheat sheet. It is a work in progress and is not finished yet.
Kinetic Energy is the energy possessed by a moving object.
Potential Energy is the energy of an object due to its height above the ground.
The total thermal energy absorbed or released when a substance changes state, measured in joules
Mechanical work is the application of a force on an object that displaces the object in the direction of the force or a component of the force.
Thermal energy is energy due to the movement of particles inside a substance.The more movement, the more thermal energy.
Nuclear Energy is found in the nucleus of an atom and keeps the protons together.
Law of Conservation of Energy
Energy can neither be created nor destroyed.
The rate of transforming energy or doing work
Nuclear Fission occurs when a heavy atom is struck by a nucleus, causing it to break apart into smaller, more stable atoms. By doing this, it releases a lot of energy.
Helium Particle is emitted.
Beta Positive Decay
A proton becomes a neutron and a positron and the positron is emitted.
Beta Negative Decay
A neutron becomes a proton and an electron, and the electron is emitted.
An electron is capture by an atom, resulting in a proton and electron forming a neutron.
A photon is emitted.
Nuclear Fusion is the process of taking small, stable atoms, and fusing them to create larger, less stable atoms. By doing this, energy is produced. No nuclear waste results from this transformation.
Thermal Energy Transfer
Thermal energy moves from hotter objects to colder objects. The transfer of thermal energy is known as heat.