Atoms/Chemistry
the smallest unit of matter
atom
when an item is magnetized, the electrons move how?
in one direction
a push or a pull on an object
force
how high a wave gets from the rest position..
amplitude
these type of waves do not need a medium to travel
electromagnetic
the nucleus is made up of
protons and neutrons
magnetic fields are strongest where on a magnet?
at the poles; where the lines are closest together
forces that are equal in size but opposite in direction are called....
balanced forces
this determines how often a wave comes in
frequency
which wave has a higher frequency, microwave or UV?
UV
the atomic number of a NEUTRAL element is also equal to
the # of protons and electrons
when an electric current temporarily produces a magnetic field, it creates an
electromagnet
forces that are unequal will cause a change in __________
motion
as wavelength increases, frequency ___________
decreases
the EM spectrum is in order of increasing _________
frequency (energy)
if an element has more electrons than protons, what kind of charge will it have
negative
generators transform ________ energy into ___________ energy
mechanical/kinetic to electrical
what law states that an object in motion will stay in motion unless acted on by an outside force...
law 1
when a wave passes through an object, it is called
transmission
these type of waves are how cellphones transmit signals
microwaves
when atoms of an element have the same # of protons and electrons, BUT different # of neutrons and mass number, they are called....
isotopes
what are 3 ways you can strengthen an electromagnet?
1. more coils wrapped around the nail
2. bigger battery source
3. bigger metal material inside the coil (bigger nail/nail made out of iron/more iron material)
the greater the mass of an object, the more force it will take to make it move... what law is this?
second law
this wave behavior is what happens when a wave passes through two different mediums (different speeds)
refraction
the only type of wave we can see on the spectrum...
visible