Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
43 Cards in this Set
- Front
- Back
|
energy
|
the ability to do work or cause change
|
|
|
kinetic energy
|
the energy of motion
|
|
|
kinetos
|
"moving" -Greek word
|
|
|
potential energy
|
energy that is stored and held in readiness
|
|
|
elastic potential energy
|
potential energy associated with objects that can be stretched or compressed
|
|
|
gravitational potential energy
|
potential energy that depends on height
|
|
|
mechanical energy
|
the energy associated with the motion or position of an object
|
|
|
thermal energy
|
total energy of the particles in an object
|
|
|
chemical energy
|
potential energy stored in chemical bonds that hole chemical compounds together
|
|
|
electrical energy
|
the energy that moving electric charges produce and carry
|
|
|
electromagnetic energy
|
energy that travels in waves that have some electrical and some magnetic properties
|
|
|
nuclear energy
|
potential energy stored in the nucleus of an atom and is released during nuclear reactions
|
|
|
nuclear fission
|
nuclear reaction when a nuceus splits
|
|
|
nucear fusion
|
nuclear reaction when nuclei fuse
|
|
|
energy conversion
|
a change from one form of energy to another.
|
|
|
law of conservation of energy
|
states that when one form of energy is converted to another, no energy is destroyed in the process
|
|
|
joule
|
the amount of work you do when you exert a force of 1N to make an object move a distance of 1Meter
|
|
|
what is the S.I unit of measurement for energy?
|
joule(J)
|
|
|
1 joule=
|
1newton-meter
|
|
|
1newton=
|
1kg-1m2/sec2
|
|
|
therefore, 1J=
|
1kg-m2s2
|
|
|
work
|
the transfer of energy that results from applying a force over a distance
|
|
|
for work to be done, the object must......
|
move in the same direction as the force
|
|
|
what is the formula for work?
|
w=f x d
|
|
|
how much kinetic energy an object has depends on 2 things....
|
1. mass of the object
2. the speed it is moving at |
|
|
the more speed, the more kinetic energy (direct proportion?)
|
not a direct proportion
|
|
|
the more mass, the more kinetic energy (direct proportion?)
|
direct proportion
|
|
|
what is the formula to find kinetic energy?
|
mass x velocity2
--------------------- 2 |
|
|
if you go twice as fast when finding kinetic energy, what happens?
|
the energy increases by 4times
|
|
|
what is the formula for finding GPE when the mass is in kg?
|
Ep=m x acceleration due to gravity x height
|
|
|
what is the formula for finding GPE when the mass is in newtons?
|
Ep=m x h
|
|
|
what is the formula for efficiency?
|
Eff= W(out)
---------- W(in) x 100 |
|
|
what do imperfect machines lose some input work to?
|
friction
|
|
|
what is efficiency?
|
the ratio of work output to work input
|
|
|
all matter is made up of small particles, called ______&_______
|
atoms&molecules
|
|
|
when the thermal energy of an object _____, its particles move faster, making the ____ of the object rise.
|
increases, heat
|
|
|
chemical energy is stored in ____&____
|
foods&matches
|
|
|
You rely on electrical energy from _________ or _____ _____ to run electrical devices such as radios, lights, and computers
|
batteries&power lines
|
|
|
electromagnetic energy travels in ________
|
waves
|
|
|
these electromagnetic energy waves have some _____ properties and some ______ properties
|
electriac & magnetic
|
|
|
i addition to visible light, ___,_______,&_________ are all examples of electromagnetic energy
|
ultraviolet radiation, microwaves, and infared radiation
|
|
|
nuclear power plants use _______ reactions to produce electricity
|
fission
|
|
|
nuclear ______ occurs in the suna and other stars
|
fusion
|
