atoms and the periodic table
The 3 subparticles that make up an atom
protons, neutrons, and electrons
the type of bond that forms between a metal and nonmetal
ionic bond
speed in a given direction
velocity
A magnet always has 2 _______
poles
analog signal
the number of protons in an atom
the atomic number
the type of bond that forms between a nonmetal and nonmetal
covalent bond
On a graph of acceleration, if the line is horizontal it shows an object _________
moving at a constant speed
A loop of wire with an electric current running through it which therefore behaves like a magnet
solenoid
materials that don't conduct an electric current well have high _______
resistance
the period of calcium
period 4
A bond that forms between two nonmetals with a significant difference in electronegativity
polar covalent bond
Newton's third law of motion
for every action, there is an equal and opposite reaction
4 ways an electromagnet's field can be strengthened
1. add a more magnetic material to the core
2. increase the voltage
3. increase number of loops in the coil
4. move loops closer together
Factors that affect an object's resistance
Material, temperature, length, and width
The group of neon
the noble gases
A chemical reaction that gives off thermal energy
exothermic chemical reaction
Between rolling friction, sliding friction, and static friction, this is the most difficult friction to overcome
static friction
A device to increase the voltage of electricity
step up transformer
high resistance in a filament is important because....
It causes electrical energy to be converted into light (and heat)
isotopes
Balance this equation: 1 ___ Na + ___ O2 --> ___ Na2O
4Na + O2--> 2 Na2O
factors that affect the strength of gravity
distance and mass
The loop that rotates in an electric motor or generator
armature
The sum of all forces acting on an object
net force