Week+5

=Daytoc 20=

**Lesson 39**
__**In Class**__
 * **Electric charge**
 * Positive
 * Cation
 * atom missing one or more electrons
 * Proton
 * Large-relative
 * 1p+=1.67*10^-27kg
 * Low Pressure
 * depletion of e-
 * Min quantity is 1 proton
 * Located in nucleus
 * Infinite variety
 * Negative
 * Anion
 * Atom with extra electrons
 * Small-relative
 * 1e-=9.11*10^-31kg
 * High pressure
 * excess e-
 * Min quantity 1 electron
 * Located orbiting nucleus
 * interchangeable, same
 * Unit of Charge
 * Coulombs
 * (C)
 * nC=*10^-9
 * Symbols Q,q
 * Law of Electron Flow
 * Ben Franklin
 * Stated: Same electric forces repel, different attract
 * Forces
 * Proportional to q
 * Inversely square proportional to distance
 * Fe=ke*abs(q1)*abs(q2)/d^2
 * ke=9*10^9
 * **Matter**
 * All mater has charges
 * Conductors
 * Allows Charge to flow easily
 * Insulator
 * Does not allow charge to flow easily
 * Does not allow charge to flow easily

__**At Home**__


 * **Basic Termonology PQ3R**
 * What is the structure of matter?
 * Everything is made up of moledules or combounds,
 * They are made up of atoms, also known as elements.
 * Atoms have subatomic particles
 * Negative electrons that move around
 * Neutral nettrons that are part of the nucleus and does not move.
 * Positive protons that also make up the nuclues
 * When is anobject charged and when is it not?
 * It is not charged when there is an equal nuber of protons and electrons.
 * It is charged when there is an unequal number.
 * How do charged forces interact?
 * Same charges repell
 * Opposite charges attract.
 * What are conductors and insulators?
 * Conductors are objects that allow electrons to flow freely
 * Insulators are objects that do not allow electrons to flow freely.
 * How can objects be polarized?
 * Objects are polarized when it is induced, meaning one side is positive and the other is negative.
 * For non conductors, it happens at the atomic level and how molecules bond.
 * Polirizing does not mean charging.
 * **Methods of Charging PQ3R**
 * What is a triboelectric series?
 * It is aseries of materials ordered by their electric affinity.
 * How is something charged by friction?
 * The electrons of one object is rubed off on to another.
 * The net charge does not change.
 * How do you charge by induction?
 * To do this you would polarize a system and then take the system apart so one side has one charge and the other has another.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l2b2.gif width="486" height="175" align="center"]]
 * The system can include an object that is grounded so in the end only one object has been charged.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l2b5.gif width="465" height="164" align="center"]]
 * How do you charge by conduction?
 * Is by having objects touch to allow electrons to flow an give an object charge.
 * The electrons do not travel through air.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l2c1.gif width="425" height="203" align="center"]]
 * What is grounding?
 * It is when an un even charge is removed through a conductive material.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l2d3.gif width="340" height="160" align="center"]]

**Lesson 40**
__**In Class**__


 * **Electric Fields**
 * A charge is surrounded by a field of influence
 * a region of space in which another charged object experiences an electric force
 * Has direction
 * Field lines
 * Lines point away from positive to negative
 * Positive going out
 * Negative coming in
 * More lines shown, stronger the field
 * Field lines can be drawn around any charged object
 * Field lines never intersect.

__**At Home**__


 * **Electric Forces PQ3R**
 * How are electric forces and regular forces related?
 * The charged fources act like other forces.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l3a2.gif align="center" caption="external image u8l3a2.gif"]]
 * What is Coulumb's law?
 * It defines that a force is depent on the charges and the distance apart they are.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l3b1.gif align="center" caption="external image u8l3b1.gif"]]
 * What is the inverse square law?
 * It state that the force is inversley square proportional to the distance.
 * How does Newton's Law and electric forces related?
 * Since electir forces act like all the other forces, they are subjected to the same laws.
 * **Electric Fields PQ3R**
 * What does action-at-a-distance mean?
 * It means that the forces of an electric fields can act on eachother at a distance.
 * How do you test the intensity of an electric field?
 * The source charge is the thing being tested and a test charge is place in the electric field.
 * The distance and the charge of the test charge can be used to find it.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4b1.gif width="206" height="100" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4b4.gif width="380" height="97" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4b2.gif width="221" height="42" align="center"]]
 * What is the meaning of field lines?
 * They represent the charge.
 * Arrows pointing away means positive
 * Arrows pointed in means negative
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4c2.gif width="290" height="139" align="center"]]
 * They represent the intesity.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4c3.gif width="397" height="169" align="center"]]
 * There are other types of configurations
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4c8.gif width="420" height="168" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4c16.gif width="431" height="294" align="center"]]
 * How does a Faraday's cage work?
 * Electrostatic equilibrium happens when an object gains electrons to the point where it can take no more.
 * The inside is called a Faraday's cage and it shields what ever is on the inside from the electricity.
 * [[image:http://www.physicsclassroom.com/Class/estatics/u8l4d2.gif width="170" height="157" align="center"]]
 * How does lightning work?
 * The charges in a cloud seperate.
 * The air acts as a conductor
 * The negative charge travel down while poistive charges travel up
 * When the two meet, lightning strikes
 * To prevent property damage and fire lightning rods are used to attract lightning and ground it.

Fun with [|static].



=Day 21=

**Lesson 41**
__**In Class**__


 * **Electric Potential Energy**
 * Depends on the location
 * Relative to electric field
 * W=PE
 * **Electric Potential**
 * Energy per C
 * PE/q=V
 * J/C=Volt
 * **Cause**
 * Goes from high to low potential

**At Home**

>>> >>>
 * **Electric Potencial Difference PQ3R**
 * How do electric fields and movement of charge relate?
 * As a charged is moved, work is being done depending on its positioin in an electric field
 * This will cause electric potencial energy to increase or decrease.
 * It also depends on the charge.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l1a4.gif width="361" height="145" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l1a4.gif width="361" height="145" align="center"]]
 * What is electric potencial based on?
 * It is based on the charge, its size and distance from the source.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l1b3.gif width="260" height="202" align="center"]]
 * What is electric potencial difference?
 * It is the difference between the intial and final potencial
 * Bateries have a simmilar property, voltage drop is the amount of voultage lost from the internal to external.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l1c3.gif width="213" height="44" align="center"]]

**Lesson 42**
__**In Class**__

**Activity**

__**At Home**__


 * **Electric Current-PQ3R**
 * What is an electric cicuit?
 * It is a sieries of conductors that connect to a source of work that pushes electrons through the wire.
 * This is called a current
 * If a ciruit is complete then a light bulp or compass can be used to determin if there is a current
 * What are the requirments for a circut?
 * There must be a closed conductive path for the electrons to flow.
 * The path must go from the positive to negative ends of a battery.
 * The bulb must have a connected filliment andnot broken
 * The cicuit must go through the side and tip of a bulb.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l2b4.gif width="199" height="293" align="center"]]
 * What is electric current?
 * It is the rate at which charge passes a certain point
 * The drift speed is the speed at which the charge carrier carries the charge.
 * How does power relate to charge?
 * Power is how much energy is used to carry a load.
 * No load means energy is used up quickly.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l2d3.gif width="358" height="41" align="center"]]
 * What is the common misconception?
 * The common misconception is that charge moves fast through a wire.
 * It acctually is slow
 * it only seems fast because the current in the cicuit all moves at once.
 * So the slightest movement cause work to be done.

[|See], you are never too young to learn about physics.



=Day 22=

**Lesson 43**
__**In Class**__


 * **Current**
 * Measure of charge flow.
 * (I)
 * Unit Ampere
 * (A)
 * #/time
 * **Resistance**
 * conductors has high resistance
 * R
 * OHM
 * Omega
 * The ability to hinder flow/current
 * **Power**
 * Work/Time=Power
 * V*q/t=Power
 * V*I=Power

__**At Home**__


 * **Electric Resistance PQ3R**
 * What does a current experience as it moves through a ciruit?
 * It experiences a drop in voltage
 * Due to loads on the ciucuit and the wire conecting the cuircit
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l3a1.gif width="363" height="221" align="center"]]
 * What is resistance?
 * It is how much the flow of charges is hindered.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l3b1.gif width="64" height="34" align="center"]]
 * What is OHM's Law?
 * It is that the change in voltage between two points is equal to the current times the total resistance between points.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l3c1.gif width="56" height="34" align="center"]]
 * How is power related?
 * It is related, because it can be combined into three equasions.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l2d7.gif width="72" height="20"]]
 * **P = I2 • R**
 * **P = [[image:http://www.physicsclassroom.com/Class/circuits/rdbddelta.gif width="8" height="8" align="bottom"]]V2 / R**

**Lesson 44**
__**In Class**__


 * **Lab**
 * **Objective**: To define OHM's Law with current and voltage.
 * **Hypothesis**: the graph of the two should be linear.
 * **Reasoning**: The resisance of an object should not change much.
 * [[file:Resistors.xlsx]]
 * [[image:G3.PNG width="800" height="137"]]
 * [[image:G1.PNG]]
 * [[image:G2.PNG]]
 * Anaylsis:
 * The bulb and resistor have different shapes because as the bulb got hotter the amount of pressure needed increased.
 * The linear line of the resistors show that it has a constant resistance rate.
 * The curved line for the bulb represents the fact that the resistance of the bulb changed.
 * Dissusion
 * Dissusion



__**At Home**__
 * **Circuit Connection PQ3R**
 * What are circuit diagrams and symbols?
 * They are to represent circuits in a basic manner.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4a2.gif width="454" height="59" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4a3.gif width="78" height="95" align="center"]]
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4a4.gif width="368" height="126" align="center"]]
 * What types of connection are there?
 * There is parallel connection.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4b3.gif width="392" height="154" align="center"]]
 * and in-series connection.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4b2.gif width="386" height="187" align="center"]]
 * What is in a series circuit?
 * In a series, all the resistance of each individual resistor adds up.
 * **Req = R1 + R2 + R3 + ...**
 * The resistance everywhere is the same.
 * The current remains the same throught.
 * **Ibattery = I1 = I2 = I3 = ...**
 * What is part of a parallel circuit?
 * Each resistor gets its own branch from the main line.
 * If one of them goes out, then the others stay lit.
 * The current for it is the total over all resistors.
 * **Itotal = I1 + I2 + I3 + ...**
 * The Resistance:
 * **1 / Req = 1 / R1 + 1 / R2 + 1 / R3 + ...**
 * What is a combination circuit?
 * It combines both types and incorporates both in a circuit.
 * [[image:http://www.physicsclassroom.com/Class/circuits/u9l4e1.gif width="198" height="134" align="center"]]

[|This] is what happens when a big circuit spark.