Cannons

A cannon is any piece of artillery that uses gunpowder or other usually explosive-based propellants to launch a projectile.
 

A Cannon is a device that uses an energy source (usually gunpowder) to launch an object in a projectile motion.

• A friction primer is used to ignite the black powder that is in the tube. The friction primer consists of a hollow tube that fits into the vent hole. At its top there is an opening through which a serrated wire can be inserted. The wire has a loop on it through which a lanyard, or rope, is attached.

  When it is time to fire the cannon the rope on the friction primer is pulled. The serrated wire creates enough heat from friction to ignite the black powder that is in the primer tube. This fire ignites the black powder in the breech. The explosion that results from the breech powder being ignited propels the projectile out the end of the tube.

Newtons Lab results

"In theory"

Thus far every hands-on creation I've conceptualized has failed dismally. Because despite every speculation that it would work "in theory", i'm gradually begun to realize that things are different in practice.

Today's challenge was a tower made out of three pieces of paper and about 50cm of masking tape. We were told to build the tallest structure we could. So we came up with the idea of a "cootie catcher" as the base and through ~rigorous~ testing we realized that we can maximize the height of the rolled up news paper if we cut one sheet of our square news paper into 4 separate squares and then fold it diagonally. But as we assembled our structure we realized we did not have nearly enough tape to tape the long stick of newspaper through the center of our cootie catcher, and in fact, the cootie catcher did not weight enough to be the center of gravity, hence our dismal failure.


"in theory" it seemed like a fool-proof plan.
i should just seek a career in janitorial studies or smth////

haiku;

Things are much better
in theoretical form.
Things like time travel. 

Tall Architecture

The tallest structure in the world is the Burj Khalifa. It is in Dubai and its height is 828 meters.   

You can see that the base of the tower is significantly bigger than the top of the structure and it gradually gets smaller as the structure gets higher.
The architects did this on purpose so that the center of gravity of the structure would be on the bottom so that it would stand, since that is where most of the weight resides.

Another projectile motion case

Some people asked me about #9 so here it is

Aerodynamics//egg-glider

G:  twenty-five straws, a meter of tape, one sheet of newspaper
R: an egg glider that can successfully glide through the air whilst carrying a chicken egg safely to the ground

A: some sort of glider that resembles a hang-glider that is aerodynamic enough to fly for a short period of time before descending gingerly. preferably triangular, so it's able to cut through air resistance and whatnot.
has to be strong enough to support the weight of the egg, soooo might have to deal with precise measurements and such
S:
S:
i forgot what the S's stood for

Homework

Kinematics Graph Translation (of the lab results)

Graph01b (d/t)

Graph01c (d/t)

Graph01d (v/t)

Graph01e (v/t)

Graph01f (v/t)

                                            

Walking the Graph

Today in physics class we did our first lab. We were given different graphs and by using a motion sensor, we tried to mimic the graphs with our own movements. There were distance/time graphs and velocity/time graphs. For the distance/time graphs our positions from the origin (or in this case the motion sensor) was relevant with our results. To achieve a positive slope, we had to walk away from the sensor, and to obtain a negative slope, we were to walk towards the sensor. But when it came to the velocity/time graphs, the only relevant factor was our speed, it did not matter what our distance from the sensor. If a part of the graph was above 0, we were walking away from the sensor, if it was below 0, we were walking towards the sensor.
There were many trials and while dismal failures brought on moans, groans and the occasional shriek, it only highlighted our elation when graph01b was RIDICULOUSLY PERFECT.
SHARON IF YOU'RE READING THIS, YOU ARE AWESOME, I AM AWESOME, OUR GRAPH WAS AWESOME AND I FEEL SOMEWHAT ACCOMPLISHED.

oh yeah, haiku;

I have realized that
words of physics are too long
to be in haikus.

although syllables
hinder the theme of my blog,
i will persevere.

Right Hand Rules; 1 and 2

RHR #1 is for conductors and it used with conventional current (+ to -). To execute the right hand rule you simply point your thumb in the direction of the current and curl your fist. The direction which your fingers are pointing towards is the direction of the magnetic field. 

RHR #2 is used for coils and conventional current. You wrap your hand around the coil with your fingers pointing in the direction of the current and your thumb should then point to the direction of the magnetic field B, or N (north). 

ooo00o0o0o another haiku;

Birds and sharks have died,

due to Earth's magnetism.
Humans feel nothing. 

Concept Map + 10 Things You Need to Know About Electricity

1. The symbol for Current is I, the unit for current is Amperes, the equation for current is I = Q/t
2. Conventional current is the direction of current from the positive terminal to the negative terminal, unlike electron flow, which is from negative to positive.
3. DC/direct current Vs. AC/alternating current
4. Series Vs. Parallel circuits
5. Ohm's Law
6. Kirchoff's Law
7. R is the symbol for Resistance, resistance is measured in Ohms, the equation for resistance is; R = V/I
8. P = IV where P represents power and is measured in joules
9. How to read resistors and graphs
10. How to draw complex circuits with voltmeters and ammeters

um, yeah, haiku;

Electricity,
is a really long word. It
has five syllables.

Introducing Ohm and Kirchhoff

Today, I learned about Ohm's Law in Physics class. Mylifeisaverage
ooOOOoooOoo I feel like a scientist,
but all my discoveries are from the internet.

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.^[1]

The mathematical equation that describes this relationship is:^[2]

where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.

Kirchoff;

(Series Circuit)

The total voltage is the sum of the voltage on each component. eq 1: V0 = V1+ V2 + V3 +...+ Vn(In this case, VT = V1+ V2) The total resistance is equal to the sum of the resistance on each component. eq 2: R0 = R1 + R2 + R3 +...+ Rn(In this case, RT = R1 + R2) The total current is equal in every component. eq 3: I0 = I1 = I2= I3= I4 =...= In(In this case, IT = I1 = I2)

Section 2. Parallel Circuit.                                                                                     The total voltage is equal in every component. eq 4: V0 = V1= V2= V3 =...= Vn(In this case, VT = V1= V2)The resistance is equal to the sum of resistance on each component divided by the product of resistance of each component. eq 5: 1/R0 = 1/R1 + 1/R2 +...+ 1/Rn(In this case, 1/RT = 1/R1 + 1/R2) The total current is equal to the sum of current in each component. eq 6: I0= I1 + I2 + I3 + I4 +...+ In(In this case, IT = I1 + I2) SOURCE

i like haikus;

Does MENSA accept
pseudo-scientists, who blog
about real science///

Favourite Roller Coaster Design

I am somewhat an adrenaline junkie and i enjoy going on roller coasters immensely. My favourite roller coaster at Wonderland is the Behemoth. It made its debut in May of 2008, it's approximately 1620m long and 70m high. It goes 125km/h and the entire ride is 3 minutes and 10 seconds of pure mind-numbing epicness.
And it looks like this: 

oooo00o0o00o so beautiful

Um, here's a haiku;


When you're going down
at an incredible speed,
You regret eating.

From Batteries to Circuits

Today, we did an activity with batteries, voltmeters and amp meters. Essentially, we built simple circuits using batteries and a light bulb. The batteries converted its chemical energy into electrical energy; which made the light bulb(load) light up.
wow, this is a really short post.

so here's a haiku;

so far I've been through
three lessons in physics class.
am i Hawking yet?

Energy Ball Experience

During my first Physics class I was arbitrarily put into a group of four and given an energy ball along with a few questions. We were told to answer the questions and during the process of which we learned about circuits and whatnot. There were two metal plates on the energy ball and by touching both plates simultaneously we were able to complete the circuit and the ball would subsequently light up and hum.


I felt somewhat special when I was the only one able to complete the circuit using my face and ear. My single talent in life turned out to be an uncanny ability to pass electrons through my body. I'm an above-average conductor. wow. 


At the end of the class Mr. Chung challenged the class to make a parallel circuit that would be able to complete the circuit of both energy balls. And the aforementioned circuit should be able to turn either one off while the other one remained on. So we formed a circle with a line of people in the middle and held only pinkies to avoid lawsuits or something. After that we assigned a switch,tested it out and successfully completed the task.


I think the energy ball didn't work on Mr. Chung because he wasn't actually touching the ball. Or maybe he has callouses on his fingers and they acted like insulators. Or maybe he's just not cut out for completing circuits.

I dunno.