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Forms of Energy
| Question | Answer |
|---|---|
| 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
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