So this summer I will be working for a company called Lumetrics which is an engineering company that develops ways to measure very thing object without ever touching said object. They do this by using light and reflection of light. This technology is currently limited to transparent and translucent material but it's still really cool. By shinning a light into an object, some of the light bounces back at the first edge, some passes through. The light that continues through hits the back edge and
In a very recent movie, a certain character purple suited character said the line "this is what happens when an unstoppable force meets an immovable object. While in the context of the movie, there was no unstoppable force or immovable object shown, what would happen in these two things really happened. But that the just the thing because all the fundamental forces are unstoppable and there is no such thing as a immovable object according to relativity. But what would a collision between an obje
With our last test we finished mechanics and official ended the first halve of the year. Surprising I didn't find the course as hard as I thought it was going to be. AP-B last year taught us most of the basics so we already knew most of the physics that we used this year. The major difference this year was the addition of calculus which isn't terribly hard compared to what Mr. Muz gives us. Also this year we aren't just given most of the equations and told to memorize; we are shown how to derive
The greatly feared captain of the pirates "Schalkimnack" was not only famous for his cruelty but also for baffling his prisoners with difficult brain twisters. This is one of his favourite riddles:
Schalkimnack took a gold coin an throw it overboard into the sea. He asked:
"Did the sea level ... a) rise, sink or c) stay like before?"
If one of the prisoners could solve the riddle, he was set free, but in case of giving the wrong answer, he was thrown to the sharks. Legend relates that un
Released in 1984 Tetris has been confounding physicists as to how the blocks move in the way they do. Now almost 30 years later, the secrets of tetris have final revealed. The blocks are moved using a combination of magnetism and electricity to move the block sideways and down. Unseen to the player each block has a slight positive charge and at the bottom of the screen there is eletric plate that is negatively charged. This causes the block to accelerate downward but it is only on for a few mill
Released in 1984 Tetris has been confounding physicists as to how the blocks move in the way they do. Now almost 30 years later, the secrets of tetris have final revealed. The blocks are moved using a combination of magnetism and electricity to move the block sideways and down. Unseen to the player each block has a slight positive charge and at the bottom of the screen there is eletric plate that is negatively charged. This causes the block to accelerate downward but it is only on for a fe
http://crazyarcade.wikispaces.com/file/view/dagobah_happy_wheels_DEMO.swf/182259727/dagobah_happy_wheels_DEMO.swf
Before reading this you should play this game and warning it is pretty gruesome.
This game has pretty good physics mostly although some parts of the game defy real life. For example the projectile motion is great because when you go off a jump or are sent flying by a land mine your body as well as the part of body that were probably blown off all have a parabolic path. Even t
Currently the only way for us to get around in space is to use rocket fuel and chemical reactions to push the rocket around. This is very expensive and current rockets are 95% fuel by weight. However NASA is developing an alternative that uses the the sun to push the rocket around. These solar sails are made with large ultra-thin mirrors that use the light of the sun to push the sail around. These sails have to be reflective because when the light hits the said it has to be reflected. This they
This was our second Independent Unit in a row and although I like the independent units a lot, I don't think have two back to back was a good idea. I know personally for me I just didn't have the motivation to get the work done and I found myself wasting whole periods. This left me with a lot of work to do last minute(hence the blogs at 11 at night). Also i feel like I don't really understand this unit as much as I do the other units, which is another result of my slacking. But we'll see how the
Plasma by definition is a highly ionized gas that usually occurs at high temperatures that conducts electricity and is affected by a magnetic field. But did know that plasma is the most common state of matter(if you don't count dark matter which hasn't been proven yet) Plasma is what makes up suns as well as lightning bolts and some regions of the earth's upper atmosphere. A plasma is composed of positive charged ion and free electrons but they're separate despite the attraction for each other.
The color that we see depends on the frequency of the light. Red Orange Yellow Green and Blue are the colors of light that we can see, so where does pink fit in? To find out, watch this video.
How about that minus green flamingo
The sport of tennis is the oldest and most love sport in the world. People have been playing tennis ever since the Acient Greeks took a stone and started hitting it back and forth over a fallen tree with branchs. Granted back then the sport was much more dangerous; many an acient greek lost an eye or a limb due to getting hit with the sharp rock that they played with, but even today the physics that govern the game today with the tennis balls with fuzz that sticks to your socks remain the same.
Red Remover is a puzzle game which relies heavy on the laws of physics and breaks almost all of them at the same time. Red Remover is a game where you have to remove all the red blocks by click on certain blocks and making them disappear. This is the and most fundamental law of physics that this game breaks because matter and energy can never be destroyed and even if by clicking on the block caused them to turn into energy, there would be so much energy that it would blow all the near by blocks
Every Police/Law enforcement show has an interrogation where the criminal sweats it out while the detectives stand behind a one way mirror. How do this mirrors work? It's all about the light. Think of you're favorite interrogation room with a one way mirror in it. It's almost always bright in there while the room on the other side is kept dark. you might of thought like I did that it was to blind the suspects but in reality it's how the mirror works. A one way mirror is basically just half a mi
As Dave said in his post, our computers class has been looking at this website called MindCipher.com. On this website there is a picture that asks, is she rotating left or right. I want to see what everyone thinks because our class is in disagreement in about this
http://www.mindcipher.com/puzzles/25
Gauss's Law
Gauss's other Law
Faraday's Law
Ampere's Law
We've already done the first one which isn't that bad and I hope they're all that simple. Although I think the second one means magnetic field though a closed surface is 0. And Faraday's law means something with E field is equal to the rate of change of magnetic flux. And i have no idea what Ampere's law is saying.
F=q(v x
R=(mv)/(qB) for a point charge in a magnetic field
v=E/B (speed at which an object must be traveling not to feel a net force in a magnetic and electric field)
T(torque)=NIA x B
F=I(L x
B=(uo)q/(4Pi)*(v x r^)/r2
B=u0nI(for solenoids)
B=u0*2I/(4Pi*R) (Due to single straight wire)
B=u0*NI/(2Pi*R) (between the inner and outer radius of a toroid)
Integral over closed surface of (B dA)=0
Integral over closed curve of (B dl)=u0Ip
r^=r/|r|
Good luck to everyone tomorrow
Today is a beautiful day for a hurricane and since we have no school we all get to sit home and watch the hurricane bear down us on the radar. Looking at the Google earth we can all see that Sandy looks like a giant cloud with a hole in the middle that is spinning counter clockwise. But why? The answer is the Coriolis effect. Now what the heck is that? "In physics, the Coriolis effect is a deflection of moving objects when they are viewed in a rotating reference frame." This is saying that an o
Real rockets work just the same as the model bottle rockets that we made for arts fest. Rocket engines instead of using water expel gases and the pressure that is used to expel these gases come from the burning of fuel.When the fuel is burn, the energy released increases the temperature of the gases that created when this fuel is spent. These super heated gases want to expand which causes the pressure to increase. As the pressure increases, the gases are pushed out the back end of the engine whi
Anyone who was in class would of heard the great debate about a certain picture that seemed to be rotating different ways. But how can two people see different things while looking at the same picture. Optical Illusions are usually 2-D things that are pretending to be 3-D and since we see life in 3-D so our brain takes the 2-D image we're seeing and makes it into 3-D the reason why people saw the girl spinning in both directions is because she is spinning both ways, only at different times. But
Skipping the intro, bullets gain all of their kinetic energy from expanding gas. When the trigger is pulled, the firing pin in the gun comes forward and ignites the gun powder in the shell. The chemical energy stored in the powder is then convert into heat which cause the temperature of the the air between the bullet and the shell to rise rapidly. Remembering the equation from last year PV/T=PV/T this shows that when the temperature increases ether the pressure or volume has to increase also. I
A bottle rocket works because of Newton's third law of motion. As more air is pumped into the "tank" the pressure increases so that when the restraint holding the rocket in place is removed, the pressurized air forces the water out of the bottle. Newton's third law states that for every action there is an equal and opposite reaction. This means that water exerts an upward force on the bottle itself. This is what sends it into the air. A nose cone works by cutting through the air instead of the b
This post is all about gravity. All the review made it clear that I needed to work on Gravity.
G-6.67*10-11 Nm2/kg2
Fg=-GMm/r2
Ug=-GMm/r
(the negative means that gravitational potential is 0 at infinite distance)
both of those are given on table
g(or gravitational field)=GM/r2
so acceleration of an object in orbit is GMe(6*1024)/(6.3*106+r)2
velocity of an object in UCM since Fc=Fg
mv2/r=GMm/r2 v2=GM/r v=(GM/r)1/2 Total energy of an object in orbit
E=KE+Ug=.5m
