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44 Cards in this Set
- Front
- Back
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Energy |
the ability to do work |
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Unit for energy |
joules |
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potential energy |
the energy stored in an object |
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elastic potential energy (EPE) |
can be stored in a spring |
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gravitational potential energy (GPE) |
energy associated with position |
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formula for EPE |
EPE= 1/2 kx^2 |
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formula for GPE |
GPE= mgh |
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kinetic energy (KE) |
energy associated with movement |
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formula for KE |
KE= 1/2mv^2 |
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Law of Conservation of Energy |
energy can be neither created nor destroyed |
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work |
is when a force acts upon an object resulting in displacement |
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formula for work |
W= FDcos0 ~0 is feta |
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power |
the amount of work done over time |
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unit for power |
watts |
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unit for work |
joules |
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formula for power |
P= W/T |
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heat |
heat is the thermal energy that is transferred from one object to another |
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radiation |
through electromagnetic waves |
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conduction |
through touch |
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convection |
through air or liquid |
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kinetic-molecular theory |
atoms, as temperature increases move faster, as temperature decreases they move slower |
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specific heat capacity |
heat energy required to raise temperature of a mass given a temperature interval |
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specific heat capacity of water |
4.18J/g`C or 4186kg |
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temperature |
measure of average kinetic energyx |
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charge |
attraction of two objects, unbalanced amount of protons and electrons |
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unit for charge |
C (coulombs) |
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conservation of charge |
total amount of charge to stay constant |
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coulomb's law |
force of attraction or repulsion of: +,+ or -,- or +,- |
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electrostatic force |
electrostaic force is the force of attraction or repulsion between two point charges |
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formula for electrostatic force |
F= k* q1q2/d^2 |
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eletricity |
energy from charged particles (is like water) |
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voltage |
force pushes electrons through current (is like the push from the water pump) |
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unit for voltage |
V |
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formula for voltage |
V=IR |
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symbol for voltage |
| ---- |
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current |
how much voltage there is (how much water flows) |
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unit for current |
Amps, it is the I in the equation |
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formula for current |
I= V/R |
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resistance |
restricts the current (restriction in a pipe, or kinking a water hose, or a dam holding back water) |
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unit for resistance |
ohms, Ω |
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ohm's law and formula |
voltage increases at a fixed rate, current increases at the same rate R= V/I |
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example of an open circuit |
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example of a closed circuit |
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example of a series circuit |
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