Friday, March 7, 2008
Like this plane...
TIME FLIES VERY FAST...
Imagine, this would be one of my last posts for this Physics blog...
Well this week, we studied about momentum and the conservation of it..
Fist, momentum is simply the moving inertia or the inertia in motion..
The change in momentum can be solved by just multiplying the mass by the change in velocity...
In the other hand, the conservation of momentum tells us about explosion and collision.. It simply means in collision, two bodies will be one and in contrast, explosion is a body that will be separated to form two or more bodies. .. There are also computations to solve those..
Maybe I will still post another one last for this Physics class..
I'm happy that I have learned a lot from this extraordinary subject..
Thanks to our teacher and/or adviser...
MR. MOSES KING MAGUNDAYAO MENDOZA...XD
``larah3ptolemy0708 ; 5:39 PM
Saturday, February 23, 2008
Cars, Trucks, Planes, and such...
Those are the things related to our topic these past few days...
In short, its all about mechanics!
Projectile, velocity, acceleration, and laws of motion..
Well, we've already been studying it since elementary... but now, it's getting more complicated...
Pwahahahaha... weird, ayt?
Well, the first law of motion is the law of inertia...
The second is the law of acceleration...
And lastly the law of interaction...
The concepts studied are still the same but the hard part is the complicated problems which will turn your minds upside down...
All you need to do is to open up your mind to the ideas in the problem..
With that, every problem will be easy for you...
``larah3ptolemy0708 ; 9:04 PM
Saturday, February 9, 2008
So sad..
We already got our report cards and..
unfortunately, my lowest grade was PHYSICS...
and I'm still thinking if i will still gonna continue doing this blog because i don't know if it has a space for the additional grade in Physics...
well, I'm totally confused right now..
I'll just study harder so that I will be able to regain my grades in physics...
``larah3ptolemy0708 ; 3:35 PM
Sunday, February 3, 2008
WANG WANG WANG....
Gad. I'm in a red alert right now...
Sir mendoza showed us our grades for the third grading period..
Let me see, I got 90% for the first quarter, also 90% for the second quarter and...
87% for the third quarter!!! whooo..
Terrible!!!! What will my parents tell me???
I did study for the third quarter.. It's just that the lessons were really hard...
That's why....
I'm in a red alert right now...
I'll try to be GC this fourth quarter.. Go! I could do this!
``larah3ptolemy0708 ; 2:52 PM
Sunday, January 20, 2008
I was somehow like this last friday...
After taking the periodical test in Physics!!!
My brain was bleeding... Oh my God! It was really hard and I don't think that I would get 50/60 or 85% of that...
I did study for the test but there were strange questions that I really don't know.. Now, I'm just praying for a miracle that my grades for this quarter would not fall down down and down...
``larah3ptolemy0708 ; 10:59 AM
Saturday, January 5, 2008
"FINGERS"
Before I thought that your fingers can only be used for math techniques[finger math]....
But yesterday, I knew that it can also be used for techniques in Physics...
Yeah.. You heard it right![i mean you saw it right]...
"YOUR FINGERS COULD BE AN AID IN LEARNING PHYSICS EASIER"
Cool, right??? And I love it so much...
Thumb for force;
Index finger foe velocity;
Middle finger for magnetic field;
The environment in our Physics room yesterday is really different from the usual Physics environment... It was indeed a great first day of Physics class for 2008... I also got a high score in the quiz... I got a mistake in number 1 because I did'nt hear the question and Sir Mendoza does'nt like to repeat the question... That time, I was still writing Quiz#12, January 4, 2008... Arrrgghhh...
But still I'm happy... It was a good start for 2008...
``larah3ptolemy0708 ; 6:01 PM
Monday, December 31, 2007
2007 is already in a critical condition... In a few minutes, it’s already gonna die… Though it’s gonna end, all the “GOOD” Physics memories will be remembered and cherished… And for the “BAD” ones, I’m gonna leave it all behind… At the mid-part of 2007, Physics was a disaster subject for me… But as time passes, that impression changes… Now, as 2007 is going to end, Physics for me is indeed a nice subject… It is often times misunderstood because of the voluminous computations and never-ending analysis… Because of that, people cannot see the beauty in this subject… Their eyes are closed to see the good things in it… Any moment from now, it will already be 2008… I hope that I would be a better Physics student…XD
``larah3ptolemy0708 ; 1:55 PM
Sunday, December 23, 2007
Yey! I’m back! I really missed my blog… I missed my blog so much!! As you can see, I wasn’t able to post stuffs for a while.. Our computer was under construction.. Actually, it’s because of that “grounded motherboard”… Whew! It’s really hard not to have a computer to use.. Well, the thing is, I’m back! I wasn’t able to post things for a long time but there are only a few things that happened to Physics when I was away to my blog posts.. Let’s start… First, we had experiments about VOM for a week and it was so cool using it! After that, we discussed the series and parallel circuits, which were confusing at first, but later, I realized that it was easy… After that, we didn’t have Physics for a week because of those tiring field demo practices.. And the last event is… When we came back, we had a long test!!! Damn! I wasn’t aware that we were going to have a long test because as I said earlier, I cant use the computer, and obviously, I cant go online to check the announcements for PHYSICS! Arrrgghh! The test also included topics that were not discussed! So when the test came, “the dice is cast”… And I failed it! I only got 25! Ahahaha.. So I will study this vacation! I need to get high grades on January because of my failing grades this December! Well, goodluck to myself!
``larah3ptolemy0708 ; 11:04 AM
Monday, November 19, 2007
Surprisingly, we had our mid-year test in physics a while ago..
and I was not able to review, even to read or scan atleast a page of my notebook..
Well, they said last week that the mid-year examination for the "add-on" subjects will be cancelled..
I thought that the never-ending tests ended last friday!
So during the weekend, I just helped my mom in our family business and did a little charity work for the poor people last sunday thinking that we will just check papers today..
Whew! This is life! We can't do anything about it as for now.. The only thing I can do is to study harder this quarter so that "that mid-year test" would not pull my grades down down and down...
``larah3ptolemy0708 ; 6:16 PM
Saturday, November 10, 2007
And Yes! We're back to school after the two week vacation!
It's already third quarter! And I can't believe that I was able to survive the most challenging subject, Physics!
The first lesson was easy! [i mean, as compared to the last lesson of the second quarter]
The formulas were simple and easy to transpose. Whew, atleast Physics becomes easier as time passes by... Hope that these easy lessons will continue til the last grading period...
``larah3ptolemy0708 ; 12:03 PM
Tuesday, October 23, 2007
Sweet leaves so crisp do fall from trees up high,
To greet the gentle change in time with peace,
These red and golden dreams so fresh breeze by,
And then they help my worry to decrease.
Sweet stars a glowing in the sky so dark,
They shine and give an everlasting light,
Their winks to me give out a brilliant spark,
My frown does fade; I see their love so bright.
Sweet sunsets grace the heavens in a breath,
And sweep smooth paint across the sky so blue,
To make a fantasy so free from death,
The colors of delight perfect my view.
The beauty of nature each day is grand;
My heart does dance with warmth upon the land.
This is Life!!!
Thanks for the sembreak... I noticed the wonderful world around me..
Anyways, I can't believe that I found the test in Physics easy... Not actually easy, but a lot lot easier than the second long test...
I'm just really thankful that I am under our adviser, Mr. Moses King Mangundayao Mendoza in Physics. Even though our grades are not as high as those of the other sections, atleast we were learning a lot.
I just remembered during the sci camp, everybody around me was complaining about the periodic test in Physics. According to them, it's really hard! As in HARD!
They don't know the answers in the essay.. They even don't know what is a half-life!!! They also don't know the decay constant, the binding energy, and everything!
Right now I am starting to treasure every knowledge imparted to us..
``larah3ptolemy0708 ; 6:47 PM
Wednesday, October 17, 2007
HALLOWEEN...
Creepy and Dark..
Two days from now will already be Halloween.. It's true! I'm serious..
October 19, 2007
Halloween of my grades in Physics...XD
Well, we will already be having our second periodic test this friday...
With more formulas, complicated lessons, and long topics, I hope that I could pass the test..
Gudluck!!!
``larah3ptolemy0708 ; 3:12 PM
Saturday, October 6, 2007
Yo! Yo! Yo! Wazzup dudes!
We became hip-hoppers yesterday during our physics time.. We actually presented our project FOR THE SECOND TIME..
We already presented our project two weeks ago, but unfortunately, it became a disaster.. Some of our groupmates forgot the lyrics and the choreography in the middle of the presentation! What the! Obviously, the grade given was pretty low... that's why Sir Mendoza gave us a second chance...
As I said earlier, we presented our project again.. This time, with a new song, new costumes, new choreography, and everything new... Whew! It was really exhausting and tiring..
The presentation yesterday is far better than the first one.. From 81, the grade became 85 according to Mr. Roniel Tribo (I don't know if its true)...
Well, atleast we passed the project..
``larah3ptolemy0708 ; 2:18 PM
Friday, September 28, 2007
Oh No!!! I gotta study harder X 100000000000000 times!
Well, after the long test, we started discussing the Coulomb's Law... and guess what??
I got a perfect zero in our quiz!!! Whhhaaaaa!!!
I really need to study and study and study and study to maintain or get a higher than my 90 grade in Physics... The lessons are getting harder... What?!
I hope that the tutorial classes in Physics will push through for us mascians to survive in this subject... But I know that I can pass this subject... I passed it last quarter so why can't I pass it this quarter?!
Go Larah! You can do it!!!
``larah3ptolemy0708 ; 7:02 PM
Saturday, September 15, 2007
It goes wherever you will go...
Recently, been thinking,
What makes food cook in microwaves,
When it's done, it feels hot,
And ready to serve on a plate.
There are different radiations,
And we can't feel it all,
Like the one in your cellphone,
But the effect is none at all.
It's deadly,
It's helpful,
These ionizing radiations,
In sky high,
Or below,
It goes wherever you will go...
Ooops! I'm sorry.. I forgot that I was about to post something on my blog.. But I really can't help it! I still have LSS!
Honestly the one that keeps on playing on my mind was the one that we've composed for the project in Physics, of course! the tune of that song is from "Wherever you will go" by The Calling... Since the first time that we've recorded that song, it really just can't get out of my head.. It goes wherever you will go.. It goes wherever you will go.. It goes wherever you will go... As you can see, I'm still addicted to that song.. Whhaaaa!!!
``larah3ptolemy0708 ; 10:11 PM
Friday, September 7, 2007
No!!! I don't wanna go in there!!!
That's an example of an optical illusion... That's one of the features in "Science in Motion"...
Before we entered the exhibit, we were really curious about the thing on the corner.. Everybody who is in there screams!!! I'm really wandering what was going on there and I keep on asking my classmates if they know what is the gadget out there but no one knows.. What?! Anyway, so when we entered that exhibit, obviously, we rushed to that UNKNOWN thing.. The guy in charge asked us hold each others hands then suddenly, we felt electricity running through our veins!!! Like the other mascians, we shouted!
For me, that's the best feature in that exhibit because I've already seen the others like the zoetrope, magnet chaotic pendulum, body resistance, adjustable object, light mix, plasma ball, money detector, levitating globe, and so on.. For me, that's a great experience.. Now, I can say that discovering science is really fun..
``larah3ptolemy0708 ; 6:48 PM
Friday, August 31, 2007
It is also used for scientific purposes, medical reasons, and to power some submarines. We can also come into contact with radiation through sources such as X-rays, nuclear power plants, and smoke detectors.
>1,000,000 million Bq...
The lessons this week was all about radiation... Microwaves, Infrared waves, Alpha particles, Ionizing radiation, Becquerel, and all other stuffs...
Well, radiation is in every part of our lives. It occurs naturally in the earth and can reach us through cosmic rays from outer space. It may also occur naturally in the water we drink or the soils in our backyard. It even exists in food, building materials, and in our own human bodies.
Hope that Sir Mendoza is just JOKING when he said that... And I also hope that I will find the next lessons easy too...
``larah3ptolemy0708 ; 7:51 PM
Monday, August 27, 2007
"CHANGE"
"Robots?! Nah.. Just a waste of time!"
Well, that was my initial reaction when Sir Mendoza told us that we should attend the Robofiesta at Shangrila. And just for the sake of my grade in Physics, I attended it even if I "DON'T" like robots.
But since the time when my foot stepped in the Robofiesta, everything CHANGED... I now find the robots really fascinating!
There are robots that can dance, that can clean, that can prepare a coffee for you, that can play basketball and a lot more! And the best of all robots is the one that answers questions!
IR 01 is the name... And I really love it! It's really amazing! He can tell you his name, where he came from, and that he's fine. Amazing, isn't it?
I'm thankful that I was able to attend that kind of event. It's indeed an experience that I will never ever forget...
``larah3ptolemy0708 ; 12:27 AM
Friday, August 24, 2007
After taking the test in Physics, I have already been thinking of so many excuses to tell my parents if ever that they would be invited for a "CONFERENCE" with Sir Mendoza because the exam is really HARD to the maximum level!
Then he day that I have been fearing of came... When Sir Mendoza gave me my testpaper, I took a very deep breath, then i slowly opened the folded testpaper... then suddenly...
"THANK YOU LORD!!!"
That is the first sentence that came out from my lips...
I passed the test!!! I was really overjoyed!!!
Whew, until now I still cant believe that I passed the test!!! I think that this week is indeed the happiest week in my life with Physics...
Hope that this will not be the last time that I will fell that kind of happiness in Physics...
``larah3ptolemy0708 ; 6:48 PM
Monday, August 13, 2007
The Big Day!!!
Yes it is! Tomorrow, August 14, 2007, will be the big day in physics... The coverage is from SOH CAH TOA until lenses... Whhaaa... Formula here, and formula there... Computations here, and computations there...
Tomorrow, we will be able to know if Manila Science High School's Batch 2009 learned anything in Physics...
Are they going to pass or fail???
Find out...
``larah3ptolemy0708 ; 6:10 PM
Wednesday, August 8, 2007
Fiber Optics If you look closely at a single optical fiber, you will see that it has the following parts: Optical fibers come in two types: Some optical fibers can be made from plastic. These fibers have a large core (0.04 inches or 1 mm diameter) and transmit visible red light (wavelength = 650 nm) from LEDs.
Fiber optics (optical fibers) are long, thin strands of very pure glass about the diameter of a human hair. They are arranged in bundles called optical cables and used to transmit light signals over long distances.
Hundreds or thousands of these optical fibers are arranged in bundles in optical cables. The bundles are protected by the cable's outer covering, called a jacket.
Single-mode fibers have small cores (about 3.5 x 10-4 inches or 9 microns in diameter) and transmit infrared laser light (wavelength = 1,300 to 1,550 nanometers). Multi-mode fibers-3 inches or 62.5 microns in diameter) and transmit infrared light (wavelength = 850 to 1,300 nm) from light-emitting diodes (LEDs). have larger cores (about 2.5 x 10How Does an Optical Fiber Transmit Light?
Suppose you want to shine a flashlight beam down a long, straight hallway. Just point the beam straight down the hallway -- light travels in straight lines, so it is no problem. What if the hallway has a bend in it? You could place a mirror at the bend to reflect the light beam around the corner. What if the hallway is very winding with multiple bends? You might line the walls with mirrors and angle the beam so that it bounces from side-to-side all along the hallway. This is exactly what happens in an optical fiber.
``larah3ptolemy0708 ; 7:08 PM
Saturday, August 4, 2007
Ray Diagram for Flat Mirror
Diverging Lens
Converging Lens
``larah3ptolemy0708 ; 3:34 PM
Friday, August 3, 2007
Eye and Camera Comparison Similarities >Opening for light to enter +aperture -pupil >Control the amount of light entering camera/eye +diaphragm control size of aperture -iris muscles control size of pupil >Refract light +glass biconvex lens -mainly cornea ; lens, aqueous & vitreous humor >Object of light action to form image +photosensitive chemicals on film -photoreceptors(rods & cones) in retina >Absorb excessive light to prevent multiple images formation +dark internal surface -pigmented, dark choroid Difference >Focusing mechanism +change distance between lens & film -change focal length of lens using ciliary muscles
Camera=Eyes
Film=Retina
Diaphragm=Iris
Aperture=Pupil
Lens=Lens
Black Paint=Choroid
Legend:
+ = camera
- = eyes
Ray Diagram for Convex mirror
Location: Opposite side of the mirror
Size: Reduced
Position: Upright
Image: Virtual
``larah3ptolemy0708 ; 8:02 PM
Thursday, August 2, 2007
Ray Diagrams for Concave mirror Location Size Position Image Beyond C Reduced Inverted Real At C At C Same Inverted Real Between C and F Beyond C Increased Inverted Real At F No image No image No image No image Between F and V Opposite side of the mirror Increased Upright Virtual
Beyond C
At C
Between C and F
At F (no image formed)
Between F and V
Summary
Between C and F
``larah3ptolemy0708 ; 4:09 PM