homework 2a vocab Flashcards
proton weighs how much more than an electron?
2,000x
BTU
British thermal unit, unit of measurement of heat.
calorie
a unit of measurement for heat in the metric system equivalent to the heat energy needed to raise the temperature of 1 gram of water by 1 degree celsius.
horsepower
a unit of measurement of mechanical power for an electric and mechanical vehicles.
electricity
a form of energy resulting from the existence of charged particles.
resistance
the opposition to current flow in an AC or DC circuit
impedance
the total opposition to current flow
electromotive force
electrical pressure, the conductor that pushes electrons through a wire.
circuit
a complete electrical path between two points.
coulomb
a quantity of electrons equal to 6.25 x 10 to the 18th power
joule
a basic metric unit of electrical energy
watt
a measure of true power or for the rate of use of electrical power.
ohm
unit of measurement for electrical resistance.
volt
a unit of measurement of electromotive force or electrical pressure.
power
the rate at which electricity is performing useful work.
energy
measure of total electrical work that has been done.
ampere
a unit that measure the rate of current flow.
compound
a. substance made of two or different elements.
molecule
smallest part of a compound made up of individual atoms.
atom
the smallest part of an element that contains all the properties of that element.
valence electrons
any electron located in the outer most ring of an atom.
quark
theorized that proton and neutrons are made of smaller particles named quarks.
neutron
a particle with no charge, same size a proton
proton
positively charges particle, has large volume and large mass
electron
negatively charged particle, small volume and small mass
