Reflection : D

Here in this picture is me holding my sign up which was used during the tennis season. If you cannot read it, it says Rath of JMoney. I got the nickname JMoney because of clothes that I have that looked "pimp" to my teammates and tend to wear those clothing at the wrong time. Hence I got the name JMoney. But the main concept is reflection. Using a huge glass pane door to close our lanai, I got a photo capture of myself holding the sign. Well in the picture, I look like I am 10 feet behind the mirror when actually its just a reflection of me, which is 10 feet away from the glass pane in the other direction. Reflection is and was used by illusionists and plays which required ghosts. Using the basic technique I used, I was able to create a mirror image of myself, 20 feet away from where I was actually standing. Neat eh?

Music in PEPSI

Just like the "Howling Tubes" experiment, i did one of my own at home. Using a Pepsi bottle from the fridge, i blew the top and listened to the sound coming from it. Then I drank some and blew again. A different sound was produced! Due to the amount of liquid, the sound produced altered. By drinking up, more space was created allowing me to potentially create and vary the waves I created. Like in the "Howling Tubes" experiment, we used water as well, but the point of it was that to create the "howl" we needed a special length to create the noise. we created the frequency, but according to that, we needed to shorten or lengthen. Hopefully at the family fair today, I can find more physicssss! Note: Especially when waiting for my ride and watching cars go by, i will be like DOPPLER EFFECT!!!!

Jump Rope Snake

Today when i was jump roping for my personal tennis conditioning i realized the physics involved when I sat on the side to take my 1 minute break. I tend to fool around with the rope at the time and i realized that the rope could correlate with the waves and frequency we are learning about now. Maybe not so directly, but it sure gave me a jolt that physics was involved. Besides the beauty of jumping rope which includes TONS of physics, making the rope into a snake deals with the basic fundamentals and principals. To make a snake i grab one end of the rope and let the other rest. Then i shuffle the rope on the ground at a constant motion until it turns into a wave. There are two ways to do this. One can be done continuous or the other, only once. By shaking it at a constant rate continuously, i create a periodic wave. If not, and I only do the single, then i created a single wave pulse. Wave pulse: A single disturbance caused by a one-time excitation. Periodic wave: A continuing wave caused by a repeated vibration. (These definitions are according to the Kinetic Books)As i alter the speed and the movement of my arm the vibration varies and has an increased amplitude and speed. Amplitude is the size of the crest formed.

Magnetssss

I apologize for the blurriness of the picture, but what we are currently learning is all about magnetism. Here on my fridge is one of the many magnets stuck to it. Magnets seem to possess a special power. As two sources move closer together, they create a magnetic field which goes on forever, but gets stronger the closer they get together. The same goes with compasses. A compass consists of a magnetized dial which produces and points to the direction north, south, east, or west, according to the way or where we stand. This tells us where the North and South poles are accordingly, as the dials point always towards one specific direction. Lodestone is a natural magnetic rock which was used for compasses (fyi). Another concept in which we are learning is Ferromagnetic, or the ability of a "strong magnetic effect exhibited by the atoms of a certain element, notably iron. It is the cause of magnetic fields commonly used in magnets." < from Kinetic Books.

Force Field!!!! O.o

A couple of weeks ago...or a...few days ago actually, we learned about light emitting rays that are not visible to the human eye, but have a glow. We also learned that they have the capability to extend this invisible force on forever, pointing in all directions. The strength of the glow depends on many factors such as the light's voltage, etc. But the important thing is to know that light is not limited, but extends on forever, getting dimmer and dimmer the farther it goes. That's why when Mr. Kohara activated the lighter, we could see a glow not in the flame but around it. It hurt to look, but hey, I learned something out of it! This glow is not only seen in light bulbs, like the picture, but signs as well, pretty much anything that emits light! You can see this on an airplane when traveling in the night, the city lights glimmering or when you eat at a restaurant and you see the glowing OPEN sign. Its all around us. FORCE FIELDS! OOOOH

Can't Touch This!

Nowadays as technology increases, our dependency seems to be straying away from gas and moving towards batteries, electronics, and outlets. Yet the idea of electric seems to correlate with voltage. While Electrical forces equals F= kQq/r^2, and fields equals E = f/q = kQ/r^2, voltage is another animal. Voltage is a ratio of potential energy over the charge. so one volt is equivalent to 1 joule of energy over 1 coulomb. Though sometimes you can see voltage as a huge number, it can be harmless depending on the ratio. A Coulomb itself is large, but for example, the Van De Graff generator pumps out 400,000 volts yet contains only a fraction of a Coulomb. (Hence it is why i am still alive today). Remember, just like speed, voltage is a ratio, which it is not necessarily the number you see. But if the Van De Graff generator DID have 1 Coulomb, I'm sorry to say, but you wouldn't see me here today. In this picture, I am showing a wall outlet, as an example of something with great voltage, enough to kill you, make you faint, or paralyze you. Can't touch that!

Torque and Moment of Intertia!

Here we can see torque in another great perspective. The equation for torque as we know is T=rf. R being the distance from axis to force, and f representing force. But another way we can look at the door handle is as I, moment of inertia. According to 11.6, a door handle like this one (solid cylinder with axis running along the center) is represented by I= .5MR^2. This amazing equation only requires you to know the radius and the mass. Once you have that, we have a masterpiece! By the way, just for reference, moment of inertia is "the measure of resistance to angular acceleration."