MOTOR assignment~!
Today in physics class, we had a challenge of building a functioning motor which is able to spin 2 cycles. my partner Keven and I had brought materials such as a wooden base, a kabob stick, 4 nails, a cork and some copper wires. Then as soon as the period start, both of us got right to work.

                                      Here is Kevin hard @ work... i actually dun hav a pic of me doing
                                      work... but i did do work 2 lol

                    After about 50 minutes of hard work, this is wat our final product looks like...

                                       I know... shes beautiful... 

                                          Woooow... is Kevin really tat much taller than me?!  

                                                   

                                      And finally our result...

 

If ur too lazy to watch the vid.... it worked

In conclusion, we successfully built a motor and  i reallyyyy enjoyed the challenge... hope tat theres more fun projects like one this in the future.

Notes on magnetics

1. A magnetic field is a region which attracts magnetic forces.
2.There are two different forces, which are north and south.
3. We can use a test compass to find out the direction in which the north seeking pole of this compass would point at the point in space.
4. The metals that attracts magnetic forces are called ferromagnetic metals. All magnets are made of ferromagentics.
5. Domain theory of magnets Domain theory of magnets states all large magnets is made up of many smaller rotating magnets called dipoles. If dipoles line up, a magnetic domain is produced.
6. Right hand rules is a way to determine how magnetic forces is functioning. There are three right hand rules in total.
7. Oersted's principle states that change moving through a conductor produces a circular magnetic field around the conductor. 
8. Right hand rule # 1 is used for conventional current flow. See image for instructions

9. The second right hand rule is used for coils. See image for instructions
 
10. The strength of a magnet can be adjusted by using the opposite magnetic field (B).

Notes on Resistance, Ohm's law

Through the past two weeks of blogging, i found a major problem with this thing... I CAN'T UPLOAD ANY PICS~~~~! But just yesterday, i discovered from Young tat I've been writing in HTML mode. DD : Anyways, here's my notes, WITH SOME PICS.

1) Current  flow depends on 2 two major factors: the potential difference of the power supply and the nature of the pathway through the loads that are using the electric potential energy.
2)  Resistance is the hindrance to the flow of charge.
3)  We  can calculate resistance by using the following formula: R (Resistance) = V (Voltage) / I (Current)
4) Ohm's law is the ratio of  Voltage over Current. As we found out with our lab, as the current increase, so does potential difference. Vise versa, if the current decreases, so will the potential difference.
5) Factors that can determine the resistance of a conductor would be the likes of length, crossed-sectional area, material it is made of and its temperature.
6) The gauge # of a wire 
                                                      signals its crossed section area.
7) In a series circuit, the loads are connected one after another in a SINGLE path. In parallel circuits, they are side by side.
8) Kirchhoff's current law: the total amount of current into a junction point of a circuit equals the total current that flows out of the same junction. This law can be represented by the following equation: I1+I2+I3=IT=I4=I5
9) Kirchhoff's Voltage law: the total of all electrical potential decreases in any complete circuit loop is equal to any potential increases in that circuit loop. This law can be represented by the following equation: VT=V1+V2+V3
10) Laws of conservation of electric charge and the conservation of energy states that in any circuit, there is no net gain or loss of electrical charge or energy.

AWESOME TABLE OF PHYSICSSSSSSS~

NAME SYMBOL UNIT DEFINITION
Voltage V Volt The potential energy difference for
each coulomb of charge.
Current I Ampere The rate of charge flows

Resistance R Ohm The measure of the opposition of the current flow

Power P Watts The rate at which work is done.

12 Mind-blowing Questions

1a)Can you make the energy ball work?
Yes, i can by putting my fingers on the two metal plates.
1b)What make the ball flash and hum?
The completion of the circuit makes the ball flash and hum. Current flowed thorough my body as i took the role of the conductor.
2. Why do you have to touch both metals contacts to make the ball work?
I have to touch both metals contacts to make the ball work because tat way, the circuit is complete.
3. Will the ball light up if you connect the contacts with any materials?
It will light up if it's connected with good conductors such as metals.
4. Which materials will make the energy ball work? Test your hypothesis
The metals rings on our binder made the ball glow. The metal zipper on my bag was also successful.
5. This ball does not work on certain individual what could cause this to happen?
Some people lack elements such as iron, copper or zinc in their body. Therefore, it would not make them good conductors. However, i do not believe that they are completely incapable of making the energy ball function. So basically... yea... i dun get it : (, but tat was my best guess.
6. Can you make the energy ball work with all 5 ~ 6 individuals in your group? Will it work with the entire class?
Yes, it works with 5 ~ 6 individuals and for the entire class, as long as it's a complete circuit.
7. What kind of a circuit can you form with one ball?
We can form a simple circuit.
8. Given 2 balls (combine 2 groups): Can you create a circuit where both balls light up?
Yes, we can by formulating a parallel circuit.
9. What do you think will happen if one person lets go of another person's hand and why?
It will break the circuit, causing the ball to not light up.
10. Does it matter who lets go?
In a simple circuit, as long as one part of the circuit is broken, the whole thing will not work. However, in a parallel circuit, if one person lets go, only one ball stops to light up, the other one, functions normally.
11. Can you create a circuit where only one ball lights up?
Yes, you would have to create a parallel circuit.
12.What is the minimum number of people required to complete this?
1 person i guess... but he gotta have long fingers and mad skillz.

blog 2: activity reflection

1. The reason tat our structure was not successful is because that the physics aspect was not successful. First, out base was not strong enough to support the whole weight of the structure, therefore causing it to constantly topple over. We also did not distribute the weight equally for the body of our structure and parts of it were under excessive stress causing the structure to bend and fall over. Overall, it was not a very successful attempt :"(.
2. i think the most important part of making a tall structure stable is to have a secure and stable base because it has to support the whole weight of the structure. Also, you have to make sure the weight of the body of the structure is even distributed so it doesn't topple over.
3. The centre of gravity, also known as centre of mass, is a point in an object which the whole body's mass is concentrated. It is a geometric property of a structure. It is important because it determines the balance of the whole subject.

blog 1: notes on current electricity

11 points on current electricity:
1. When electrons repel against each other, it creates energy. Through a conductor, this energy has many uses such as providing energy for various electronic applications.
2. When the charge is transferred from the conductor, the flow of the is called electric current.
3.In some ways, electrons flowing in a conductor is a lot like water flowing in a water-pipe.
4. The rate of current can be calculated with the following equation:
I(current in amperes) = Q(charge in coulombs)/ t(time in seconds)
5. Conventional current assumes the current flows out of the positive terminal. But in reality, this idea is wrong. The current actually flows out of the negative terminal and enters through the object's positive terminal.
http://www.mi.mun.ca/users/cchaulk/eltk1100/ivse/ivse.htm
6. A way of measuring current is by using an ammeter. You must make the ammeter a part of the circuit in order to measure the current and the ammeter must be a very good conductor so the energy do not escape from it.

7. In a direct current, electrons flows in one direction but in an alternating current, electrons sometimes travels backwards.
8. http://www.kpsec.freeuk.com/symbol.htm (a site all about Drawing circuits and circuits symbols)
9. The electric potential difference can be calculated with the following equation:
V (potential difference)= E(energy) / Q (charge)
10. A measuring device for potential energy difference would be a voltmeter. A voltmeter needs to be connected with a load in the circuit in order to function. Unlike a ammeter, a voltmeter must have a great resistance for the energy passed on to the object to minimize the current diverted in the circuit.

11. electricity, transfer of energy and convection is all very useful to meteorologists.