Magnetism
Where is the strongest part of the magnet?
The Poles
If I have two charged objects that are opposite charges (a positive and negative) what will happen?
They will ATTRACT
Gravitational forces are always .... (attractive or repulsive)
Attractive!
What force does an electric current produce?
Magnetism
Name the 3 types of heat transfer
Conduction, Radiation, Convection
Magnetic poles that are alike will do what?
REPEL
What is static electricity?
Static electricity is the storage of extra electrons
How can you increase gravitational force?
Increase Mass
What is the middle part of the electromagnetic called, with the coils?
SOLENOID
What is "stored" energy called?
Potential
If you have iron filings showing a magnetic field, and then you remove the iron filings - does the field still exist?
Yes. The field still exists. The magnetic field is invisible and the iron filings help us see that it is there.
What is current electricity?
Current electricity is electricity that flows in a continuous circuit
If you were to go to the moon, which has less mass than Earth, what happens to the gravitational pull there?
It decreases - thus why we would jump 12 feet
What three things do you need to make an electromagnet?
Battery (energy source), copper wire (solenoid), iron nail
If you increase the mass of something, what happens to its speed?
It increases
How do you increase the strength of a magnet?
Decrease Distance
What is electricity?
The flow of electrons
What happens to your mass on the moon?
Mass stays the same!
How can you increase the strength of an electromagnet?
increase # of wraps, increase voltage (power source), increase size of iron core
What are the 3 states of matter?
Solid, Liquid, Gas
If two opposite poles are far away from each other, what happens to their attractiveness?
It decreases
What do we measure Resistance in (what unit)? AND, what symbol do we use?
Measured in Ohms with an Omega symbol
The force of attraction between two objects with mass
In Japan they use "Mag-lev" Trains that can travel up to speeds of 500 mph - what force powers these trains?
Electromagnetism!!
Name the phase change when a gas becomes a liquid
CONDENSATION