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energy study cards
| Term | Definition |
|---|---|
| renewable | something that is not dissipated or depleted by use over and over |
| crest | highest point in a wave |
| trough | lowest point in a wave |
| non renewable | something that is dissipated or depleted by one use |
| medium | the intervening substance through which impressions are conveyed to the senses or a force acts on objects at a distance |
| vacuum | a space completely devoid of matter |
| forms of energy (7) | -chemical -electrical -light -mechanical -solar -sound -thermal |
| energy states (2) | -potential -kinetic |
| electromagnetic waves | radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge |
| mechanical waves | A mechanical wave is a wave that propagates as an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited |
| work calculations | force x distance |
| vibration | a repeated back and forth up and down motion |
| newton | a measurement of force and weight. |
| speed calculations | distance x time |
| wavelength | the distance between successive crests of a wave |
| amplitude | height of a crest from the rest position. |
| newton meters | the force of one newton and distance. |
| energy transfer conversions | kg and meters to joules weight distance and time to watts |
| four factors of friction | mass, texture, density, and weight |
| reduction | the action or fact of making a specified thing smaller or less in amount, degree, or size |
| pitch | the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone |
| law of conservation of energy | energy is not created or destroyed only conserved |
| energy in a closed system | is reused and keeps going around and around |
| energy in an open system | is let free to appear to be dissipated |
| System boundaries | A system boundary is an optional visual aid in the diagram; it does not add semantic value to the model. |
| wave | a disturbance that transfers energy from place to place. |
| transverse waves | a wave vibrating at right angles to the direction of its propagation |
| longitudinal waves | a wave vibrating in the direction of propagation |
| a closed system _______________ | keeps the energy reproducing and converted |
| Why does it appear that energy has been lost or disappears in an open system? | Because the energy isn't reused, but instead released into the air, and energy is very difficult if not impossible to capture. |
| Human body Open / Closed Explanation: | closed, because we are born, we eat, we decompose food, that food goes into the ground, that food grows more food, we eat it, etc. |
| Mental Boundary /Physical Boundary / Both Explanation | physical, because there is only a certain extent your body can go to. |
| Earth’s Atmosphere Open / Closed Explanation: | closed, because out atmosphere traps heat in. Heat is energy. |
| Mental Boundary /Physical Boundary / Both | this would be a physical but unseeable boundary. |
| Ecosystem Open / Closed Explanation: | closed, because we are born, we eat, we decompose food, that food goes into the ground, that food grows more food, we eat it, WE decompose and also help food grow. |
| Mental Boundary /Physical Boundary / Both Explanation: | physical, we are seen decomposing in real life, not in our heads. |
| How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m to the side of the road? | 3150Nx75.5M=237825J |
| When you drop a penny in a water fountain, explain the vibrations of the water particles as the energy travels through them | the vibrations are high pitched and quiet. |
| How does a wave move? (Hint: Describe the direction and movement of particles.) | the waves of energy move in a certain direction as they move up and down. |
| label the parts of a transverse wave. Describe the motion of the energy as it passes through the medium. | Highest part:crest lowest part:trough space between crest and resting point: amplitude the motion of energy becomes less as the medium resists the energy. |
| Give an example of a medium that mechanical waves travel through. | water |
| A tuning fork has a frequency of 310Hz. The wavelength of the sound produced by the tuning fork is 1.32m. Calculate the velocity of the wave | 310x1.32=409.2λ |
| How does the state of matter affect a wave’s length and/or speed? (solid, liquid, gas) | the matter resists the energy of the wave, making the length and/or speed less. |
Created by:
mattattack142
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