Energy Unit - created from Mind Map

Seite 1

Methods to Store Energy

Classification of Energy

Energy in Fields

Forces in Fields

Battery = Positive electrolyte + Negative electrolyte + Electrolyte

Solar and Hydro : Renewable energy sources

Size, Safety, and Duration*

Lithium Ion batteries found in phones. Carbon & Water used to make them safer

Saltwater batter: Can be recharged.

Potential Energy: Stored / Energy of Position.

Kinetic Energy - Moving energy (not stored)

Law of Conservation of Energy = The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

GPE = PE = mgh

Mechanical Energy - stored in the deformation of an object

PEg = mgDelta h

Chemical Energy - energy stored in the chemical bonds between atom

Electric Potential Electric Potential Difference – Voltage + area - pulls electrons - area - pushes electrons

Nuclear Energy - Energy stored within the nucleus of atoms, energy holding protons togethe

Mechanical Energy - everyday objects in motion

Electricity – electrical current

Heat energy

Waves – transfers energy from one area to another. Energy (a) the wave’s amplitude

Electromagnetic Waves - oscillations in an electric and magnetic fields.

LOL Diagrams - https://www.physicsclassroom.com/class/energy/Lesson-2/Bar-Chart-Illustrations

Work - transfer of energy via force - happens when force is applied to an opposing force over a distance

Work : Conservative force - Total work done in moving particle is independent (electrostatic/magnetic)

Non-Conservative Force - Always change the total mechanical energy of the system, sometimes increase speed.

Qantifying Energy - Measured using Joules (J) - Calcucations: PE = mgh KE = 1/2mv^2 GPE = weight x height

Energy in Food - Kilocalories (Kcal) Calculations: Energy (joules) = Mass of water (g) × 4.2 (J/gºC) × Temperature increase (ºC)

Electric: "This electric potential energy per charge is known as Electrical Potential or voltage.

Mechanical Energy

Gravitational: Work done to an object with energy: GPE

Storage of mass in a gravitational field.

Electrical Energy

Storage of charge in an electrical field

Electromagnetic Energy

Energy that is emitted through electrical and magnetic waves.

Electrical Resistance

Ohms Law - strength of a direct current is proportional to potential difference and inversely to resistance : Ohm's Law I = U/R

Gravitational Field - all objects with mass

Storing Charge/Energy in Capacitors

Electric Field - all objects with charges

Magnetic Field - all moving charges/ interaction of fields

Batteries > Capacitors : Batteries store more for longer.

Oxidation Is about Loss of electrons and Reduction Is about Gain of electrons

Earths Magnetic Field - Needed because the field shields the earth from solar particles and directs our compasses

Faradays Law : When magnetic field changes, it creates voltage and difference in EPE, creating current.

Batteries discharge by: "During discharge, the battery functions as a galvanic cell, where chemical energy is converted into electrical energy. "

Recharge: Oxidation and reduction processes reverse, and electrical energy is reverted to chemical.