Electrostatic and Static Electricity Quiz

[Joe Ghiorzi]

Whats on the Quiz 1/6

History of the Atom: Use your timeline. If you don't have it, Mine can be found here: http://min.us/mOXxh18yZ

Parts of the Atom: C'mon you know this. Protons Electrons and Neutrons.
Protons: Symbol p+. AMU=1 Mass in grams =1.672*10^24. Elementary Charge of +1 Charge in Columbs is 1.602*10^-19
Electrons: Symbol e-. AMU= 5.5*10^-4 Mass in grams =9.1*10^27. Elementary Charge of -1 Charge in Columbs is -1.602*10^-19
Neutrons: n. AMU=1 Mass in grams =1.675*10^24. Elementary Charge of 0 Charge in Columbs is 0
Static Electricity: All the information can be found in your static Electricity packet. The Two big concepts are Polarization and Conduction
Polarization: Is where a charged object is brought into the vicinity of another (neutral) object but they do not touch. Because the charged object exerts an electrostatic force the electrons inside the neutral object move towards or away from the charged object based on the charge of the object. For example, one object has a negative charge, the electrons in the neutral object will move away from the object with the negative charge cause like charges repel. Its pretty much (Bringing back some chemistry here) Dipole Dipole movement.
Conduction is the transfer of electrons by direct contact. This is like where we rubbed a balloon to your hair and stuck it to the door and the balloon stuck to the door. Because the material that makes the balloon has a high electronegitivity, it really wants those electrons. So when you rub the balloon in your hair, the electrons in your hair jump over to the balloon resulting in the balloon having a negative net charge. Then once you bring it to the door, the balloon sticks because the electrons in the balloon are attracted to the protons in the door.


Note: This isnt done, and if anybody understands the electrostatic force packet really well, please put it down in the comments. Im not too sharp on that and I do not want to give misleading information

[Dinher]

Here are the equations I had on my notes:

Gravity Equation(don't need to know gravity equations, I just wrote them because that's what we compared electricity to)
Fg=(G*m1*m2)/r^2

Coulomb’s Law
FE=(K*q1*q2)/d^2
This one is relatively simple. Charged particles emit an electric field. Much like the Earth's gravitational field, the amount of distance between the two charges is inversely proportional to the force of the field. As one charged particle gets farther away from the other, the force of the electric field weakens. The charge of the particle also affects force. Again, this can be compared to gravity, where gravitational force increases with mass. The same can be applied here. The greater the charge on either particle, the greater the force.

FE=Force of electric field
K=8.98 x 10^9 N (constants are given. probably won't need to know this.)
q=charge
d=distance

Gravitational Potential Energy(again,just here for reference.Don't need gravity)
GPE=mgh

Electric Potential Energy
EE=q*E*d
Again, electric fields can be compared to gravitational fields. Imagine you are lifting a bowl of delectable, scrumptious rice from a table. The higher you lift it, the more potential energy you give it, because you are doing work against Earth's gravity. Mass and gravitational force also directly correlate with potential energy. Once again, very simple, yet it can apply to electric fields. The farther apart the particles are, or the higher their charges, or the stronger the electric field, the higher the electric potential energy will be.

EE=electric potential energy
E=force of electric field

Work Equations
W=f*d -
Duh.

W=q*E*d -
It is the same as the formula for electric potential energy because once the potential energy is released, it becomes work. Mathematically, the reason that this is the same as force times distance is that the unit for charge is Coulombs, while the unit for electric force is Newtons/Coulombs. This leaves you with just Newtons: force.
Dividing both sides by the charge makes this equation much simpler. It gives us:

W/q=(q*E*d)/q or

W/q=E*d -
W/q is another way of expressing voltage, because voltage by definition is the amount of work per charge needed to move the charged particle a certain distance. Therefore:

V=W/q=E*d

[crystal]

So the class before the timeline was due, Beltz came into our class and threw this info at us and I copied it down.
this is basically just word-for-word

Sub-Atomic Particles

FIRST GUY: Democratus – first started talking about atoms
• Atom means “indivisible”

SECOND GUY: Dalton - Gave us a refined definition of atoms:
• “elements can be broken down into atoms”
• “all atoms of the same element are the same”
• “all atoms are indivisible”
• “atoms can be combined to make compounds”

THIRD GUY: J.J. Thomson
• Plum pudding guy! – electrons (negative particles) exist randomly inside an atom (like a chocolate chip cookie)
• Won a nobel prize
• figured that there had to be some to be some separation of charge because atoms were neutral

FOURTH GUY: Ernest Rutherford
• Did the gold foil experiment
• Some went through the foil, some went awry, some bounced back – discovered the nucleus!
• Discovered that there was empty space in the atom

FIFTH GUY: Niels Bohr
• “electrons are out here and they circle the nucleus, kinda like the planets and the sun”

SIXTH GUY(s): De Broglie & Shrohdinger
• Electron Cloud Thinger

(i don't think we have to know dates)

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