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Forms of Energy

Changing Forms of Energy Energy is most noticeable as it transforms from one type to another.
Changing forms of Energy An example of transforming chemical energy is a car engine. Chemical potential energy in gasoline is transformed into kinetic energy of the car as it moves!!
KE and PE In many situations, there is a conversion between potential and kinetic energy.
mechanical energy term The total amount of potential and kinetic energy in a system
Mechanical energy = PE + KE
Mechanical energy is due to the position and motion of the object.
What happens to the mechanical energy of an apple as it falls from a tree? As the apple falls to the ground, its height decreases. Therefore, its GPE (Greatest Potential Energy)decreases.
The mechanical energy does not change because the loss in potential energy is simply transferred into kinetic energy. The energy in the system remains constant!! The total amount of energy stays the SAME!!
The Law of Conservation of Energy states that energy cannot be created or destroyed. The big picture… the total energy in the universe remains constant.
Conservation of Energy Friction causes some of the mechanical energy of the swing to change to thermal energy and the temperature of the hooks and chain heat up a little. The energy is still there, just in a different form!!
Conservation of Energy Energy is transformed… not destroyed!! The total amount of energy stays the SAME!!
Energy in Your Body Even the energy converted in your body follows the law of conservation of energy. Chemical potential energy is transferred to kinetic energy that allows your body to move!!
Calories (C) is a unit to measure energy in foods.
1 Calorie= about 4,184 Joules.
A person uses about: 55 Calories while sleeping for 1 hour 210 Calories while walking for 1 hour 850 Calories while running for 1 hour
Block Process Flow Diagram a physical representation of inputs and outputs of a process, used by engineers
Chemical Energy energy stored with chemical bonds
Combustion the process of burning organic chemical to release heated light
Conservation careful used of resources with the goal of reducing environmental damage or resource depletion
Efficiency ability of a process or machine to convert energy input to energy output, this is always less than 100% in real processes. This of a system can be quantified as the ratio of the useful output energy (or power) to the input energy (or power)
Electrical Energy energy made available by the flow of electric charge through a conductor
Electromagnetic Energy a form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. Ex. including gamma rays, x-rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves
Energy Conversion transformation of one form of energy in another, usually ro convert the energy into a more useful form
First Law of Thermodynamics energy can neither be created nor destroyed
Forms of Energy primary forms of energy include thermal (heat), radiant (light), electrical, mechanical, atomic (nuclear), sound and chemical
Heat Energy a form energy related to its temperature. More formally described a thermal energy
Input matter or energy going into a process
Kinetic Energy energy of motion, influenced by an objects mass and speed
Mechanical Energy a form of energy related to the movement of an object
Nuclear Energy energy produced by spitting the nuclei of certain elements
Output matter of energy coming out of a process
Potential Energy energy that is stored and that comes from an object's position or condition
Radiant Energy energy transmitted to the earth from the sun by the light (or by any source of light) Light is also a subset of electromagnetic radiation
Created by: erica.kercher