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Energy Test Study Guide
Terms in this set (28)
Definition of energy
The ability to do work
Definition and example of kinetic energy
Energy that an object has due to its motion. A bowling ball rolling
Definition and example of sound
Is the energy carried by sound waves. Fire cracker
Energy conversion/transfer definition
when energy is changed from one form to another
Definition & example of electrical energy, electricity, static electricity
The energy of electrical charge. A battery.
Definition and example of potential energy & (GPE)
Stored energy that results from the position or shape of an object. A frog leaping.
Formula for potential energy
Mass X gravitational field strenght X height
Two things potential energy depends on
Positon & shape
Definition and example of mechanical energy
Form of energy assoiciated with the posiiton and motion of an object. Quarterback throwing a football
Definition and example of thermal/heat energy
The total potential and kinetic energy of the particles in an object. The human body, over heating computer
Formula for kinetic energy
1/2 X Mass X velocity squared
2 things kinetic energy depends on
The velocity and mass of an object.
Definition and example of chemical energy
Is potential energy stored in the chemical bonds that hold chemical compounds together. A banana
Definition and example of electro-magnetic energy
The energy of light and other forms of radiation. The Sun
An energy conversion using electromagnetic energy to start with
sloar energy from the sun is used by silicone to convert into light and eletricity.
Example of an energy conversions in a car using at lease 3 energy types
Electric, sound, chemical
All energy conversions produce this type of energy as a byproduct
An energy conversion using kinetic energy to start with
Law of conservation of energy
The rule of energy that energy cant be created or destroyed.
How the law of conservation of energy applies to a bouncy ball
The gravitational potential energy of the ball falling is released into the ground.
Perpetual motion definition and why it is impossible
ongoing; constant; non-stop; continuing. Nothing can be continuous because it doesnt loose or gain energy.
Name some energy transfers in roller coasters & swings
Electrical to gravitational to kinetic energy.
How sound travels through air and into the ear to the brain
Sound vcibrations are picked up and travel down the ear canal.
Amplitude vs. frequency in wave energy
The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium vs The number of complete waves that pss a given point in a certain amount of time together is the transfer energy from place to place.
Definition of hertz, volt, and ohm
hertz is unit of measurement for frequency. volt is the difference in electrical potential energy between two places in a circuit. ohm is how difficult it is for a current to flow through a conductor.
Definitions of reflect, diffract, and refract in terms of waves of energy
refraction is the bending of waves as they enter a new medium at an angle. reflection is the bouncing back of an object or a wave when it hits a surface through which it cannot pass. diffraction is the bending of waves as they pass or move around a barrier or pass through n opening.
Difference between and open and closed circuit
an open circuit is not a complete circuit and a closed on is complete.
Difference between series and parallel circuits.
a series circuit has on path for a electrical current and a parrallel has several.
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