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energy study cards

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