1. # Stephanie528's Blog

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So everytime I need to make blog posts I always try to connect what we have been learning in physics to my favorite sport: softball. Now you might think that there are no waves in softball but I am creative and I believe I have found some sort of wave while playing softball. When people throw a softball really high it creates a giant lob that looks like a parabola. And this lob could also look like a half a wave. And if you measured from the ground to where the highest part of the ball reached, you would get the amplitude. But of course, the so called wave would never be finished you would only get to a half a wave and then the ball would hit the ground and die. But today we learned about reflection and could be applied to softball as well. When the ball hits the ground it will be reflected back at the same angle. So I the ball was thrown at a sharp angle measured to the normal line like 70 degrees. The ball would bounce back at that same angle. So while fielding, depending on how the ball hit the ground, you could prepare yourself for where the ball will jump next. Physics can improve your fielding skills.

2. # JessByrnes717's Blog

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I just hit a parked car (I did not do a hit and run i waited and hour for the people to come to there car) I was trying to pull around a bend into a front row spot i thought i cleared the car that was next to mine. Unfortunately, my depth perception was wayyyyy of! Because i drive a big truck it was hard to judge the distance between my car and the tiny little car that i hit. I then hit the car and the energy from my car was transferred from my car to the tiny car. The tiny car then moved after my car hit it and stopped. Then i went into reverse and pulled into the spot to asses the damage that was done. I look at the little car. The dent on its bumper was as deep as a giant cereal bowl. Like you could eat 2 servings of your lucky charms out of it. After the panic was gone i realized how much physics was involved in stupid mistake. Anyways, I then thought oh god i can't even imagine what my car looks like! I then walk to the front corner of my front bumper to see the damage. My ol trusty rusty only had a scratch on it no dent at all. I thought how could this be then I realized that the Force i applied on the tiny car must have been so much because my car was so much bigger. Fnet= Ma. So I was taking a corner at a speed/velocity of 4 m/s.The mass of my car is 2143.22 kg. and I was accelerating at a speed of about 4 m/s squared. therefore the force applied to little car 8,572.88 newtons. Then i though about how my car made the little car move! Bucky must have had to put forth a lot of work. Bucky is the name of my car. Work, W=fd. The displacement from where my car was and by the time i hit the tiny car was probably about 1 meter. So the work exerted by Bucky 8,572.88. N Thats a lot of work! poor Buck! SO the morel of the story is never go for the front row spot! Park out in east jesus because trust me the walk will be much better than exchange insurance info with a pissed off lady.

3. # Amanda's Blog

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Ever since I was little, I've been interested in thunder and lightning. The lightning would always crack across the sky and that would be followed by a boom of thunder. When i was young, I neve knew why these things happened or anything about sound and light. But now as a student of physics, I know some interesting facts about these occurances.

Light and sound are both a very big part of our everday life. Without them, life would be very different. Light travels faster than sound. That's why you experience lightning before thunder. Light can travel at about 299792458 meters per second. While sound travels at about 340.29 meters per second. This difference in speed is huge. There is supposedly nothing that can travel faster than light.

If you put a lamp in a vacumn, you'd still be able to see the light it produces. If you put your iPod in a vacumn and played your favorite song, no sound would be produced. This is because sound cannot travel through a vacumn, but light can.

To this day I'm still intrigued by thunder and lightning, but knowing the science behind them is pretty cool too.

4. # Lynn152461's Blog

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As someone who is extremely afraid of heights, it is highly unlikely that I will ever go skydiving. However, that doesn't mean I can't appreciate the physics of it. For instance, skydivers accelerate when they go down because the force of gravity is greater than the drag on their bodies. Also, the acceleration in question will always be 9.81 m/s^2 as that is the acceleration due to gravity. But when the parachute is opened, the increase in surface area creates an increase in drag, therefore making the skydiver slow down.

5. # IVIR GREAT's Physics

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This past weekend, I saw a giant game of Jenga at MIT. Literally. The blocks were nearly 2x4s, and the structure was taller than I am. While I did not stay to watch, it is interesting to think about a few of the different strategies that I remember from my childhood days. First of all, I used to believe that the faster you pulled the object out, the less chance a collapse would occur. While I'm not sure of my logic behind this reasoning, I most likely imagined that hopefully the structure just wouldn't have time to collapse if I pulled it fast enough (Yeah, I know). However, after the block is removed, whether quick or slow, the structure will still have the exact same properties regardless of speed. Another theory may be to reduce friction, but it is important to note that the frictional force does not rely on velocity, it relies on the normal force. The one factor that does effect the result of the turn is how straight you are able to pull the block out. By pulling the block straight out, you are minimizing the normal force, but if you tilt to one side or another, you are increasing the normal force and creating a larger frictional force.

Another concept of the game Jenga is torque. Since torque is F x r and the r in most jenga games is relatively small, the structure can often withstand the removal of blocks that may have seemed impossible. The middle block is at the center of the fulcrum, so the r would be 0, allowing players to theoretically remove all of the outside blocks while keeping a cross pattern in the middle. This is much easier said than done due to the friction caused by uneven pulls (an even perfect pulls as the wood has a large surface area) and the fact that even a small breeze can cause enough torque in the other direction to knock the tower down. A horizontal breeze may have a small force, but since the center point is technically the ground in this plane, the r would be as tall as the tower.

Hopefully, the physics of Jenga could help people improve their gameplay, but to be honest, isn't the best part watching it all fall?

6. # Physics in the Real World

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A simple snap-back mousetrap is a clever machine. With just a few parts (a wooden base, a spring, a metal bar, and a trigger mechanism) it can do its job quickly and efficiently.  When a mousetrap is set, the spring in the center is compressed, becoming a source full of potential energy. This energy is being stored, not used, but as soon as the trap is released, it is converted to kinetic energy (the energy of motion) that propels the snapper arm forward.  This is a perfect example of conservation of energy.  It takes an amount of force to set the mousetrap and when the trap is triggered, it creates a force onto the mouse that triggered it.

7. # Home is Where Your Displacement is Zero

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Many of us know the Aurora Borealis as the 'Northern Lights'. This natural phenomenon is, of course, thanks to the physics of our Earth and its atmosphere!

(Photo credit: NASA)

The Aurora Borealis is an extremely beautiful event that occurs most often close to the magnetic poles of Earth. It occurs due to charged particles coming from the Sun of which collide with other molecules found in the Earth's atmosphere. Solar winds from the Sun carry these charged particles and when the wind passes by Earth, particles may be trapped in the atmosphere from the Earth's magnetic fields! The charged particles ionize molecules in the atmosphere, which give off light. This creates the Aurora Borealis!

I had previously thought that the Northern Lights were from light reflecting somehow, but it awesome to see that it is caused by magnetism, which fits into our past few units very nicely.

8. # necharles17's Blog

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When professional tennis players serve , the ball usually goes anywhere from 120 to 163.4 MPH (fastest recorded in history) which is pretty darn fast. They try to serve the ball as close to the net as they can so their opponent has a harder time of returning it. The closer to the net makes it so the angle to the incident is greater. The bigger the angle of incident is, the closer the ball is to the ground because it is measured against a right angle with the ground. If there is a small angle of incident, that means the ball bounces more vertically and is easier for the opponent to put away and possible smash into your face which is their point. That is why tennis players try to get the ball as close to the net as they can.

9. # Bogart's Blogging Bonanza

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In my previous blog post, I discussed the overall interface you'll be using in Kerbal Space Program. If you don't know what you're doing, I recommend reading that first before continuing on with this post.

Before I even start with actual designs of rockets, I'm going to teach you how to build quickly and efficiently.

To start, you'll need to place down a part. Keep in mind that the first part you place down is the part you're going to have to build off of. Whenever you pick up this part, you will pick up your entire rocket. Whenever you pick up a part connected to this part, it will pick up every part placed on that part, excluding the first part. Now that you understand that, you're going to need to know how to move around effectively.

By holding right-click, you can rotate around a certain point on the center axis of your rocket. By using the scroll wheel, you can move vertically up and down. By holding Shift and using the scroll wheel, you will move closer to and farther from the center axis of your rocket (Alternatively, you could do this by holding down the middle-mouse button and moving your mouse up/down).

When building a ship,

Now we can get into some design basics.

There's a lot of things to take into account when designing a rocket, even in a video game.

Always remember to take aerodynamics into account. You can't just launch anything through the atmosphere at well over the speed of sound and expect it to be fine. Take the following, for example.

This is a simple landing can with some batteries, retractable solar panels, RCS fuel tanks, and an antenna. If you launched this through the atmosphere, something could very easily break, especially if you used the unprotected versions of the solar panels, or, lord forbid, you extended them. But then how would you get this into space? Well, there's many solutions, such as trying to fit it all inside of a cargo container, or you could make a column of octagonal struts and strap the bits onto that.

There is also one other thing in the game you can use, and it's quite stylish. First, you'd have to disconnect the entire top piece from the landing capsule, and place an "Airstream Protective Shell" on top of the capsule. When you first place it, it'll start dragging a frame with your cursor, but just right-click to temporarily remove it. Then, re-place the top piece on top of the Protective Shell part. Here's where things get interesting. Right click on the Protective Shell part, and click "Build Fairing" as shown below, then drag the frame up along your top piece, and click when you want to start to drag it in. You can use the other picture below as reference.

This fairing can be ejected as part of a stage when you leave the atmosphere, so the craft on the left will look like the craft on the right. Just be careful with your design for when you do eject it, because it shoots sideways.

Here's another aerodynamics example:

This rocket will fly. But after a little bit, it will start to flip out of control, and plummet into the ground. But why? If you build a ship like this and deviate from being normal to the ground by even the slightest amount, air resistance kicks in, and your rocket will flip upside-down. So how do you avoid this? Simple: Add some wings. Two could work, but you should add more, just to be safe.

Another thing commonly done in KSP is when people add tons of fuel to their spacecraft, and then is surprised when they can barely get into orbit. Keep in mind that adding more fuel does let you burn longer, but also increases the weight of your rocket. Your thrusters will always put out a certain amount of force, and if you just add more fuel to your craft, you might end up with less delta-v than you started out with. We all took Mechanics, so you should know that net force is equal to mass times acceleration, so if mass goes up but force stays constant, acceleration must go down.

Some other things to think about include:

- Do you need extra power?

- Do you need power generation?

- Do you need heat reduction?

- Do you have a heat shield?

- Does it look nice?

- Is it powerful enough to get you where you need to go?

- Does it weigh too much?

- Do you have enough parachutes?

- Should you add high-altitude parachutes?

And, most importantly, something forgotten in the following picture.

Yes, there are no wings, and it is hideous, but those aren't the biggest faults with the spacecraft.

If you look on the bottom left, it shows the staging. Every time you press the spacebar, you begin the next stage. In this case, the first stage would start the first thruster, but would also trigger the decoupler, disconnecting the main booster from the rest of the rocket. Now look at the final stage. When triggering the last decoupler to expose the heat shield for re-entry, it would also trigger the parachute, rendering it useless, and dooming poor Jebediah to crash into the planet.

Even if your design is perfect, one simple mistake in the staging could ruin everything when you least expect it, so always remember to check it before you wreck it.

In my next blog post, I'm going to discuss simple flight controls and methods.

10. # Physics blogs

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The gold foil experiment is the famous experiment conducted by Ernest Rutherford that we all learned about in chemistry class. This experiment proved that atoms are made up of mostly empty space. In fact 99.9999% of an atom was proven in this experiment to be empty space. Lets say we could eliminate all that empty space by condensing the parts of an atom together. How much weight could we fit in a small space such as a single teaspoon? Over a billion tons!

This idea is common when studying astronomy. At the end of a stars life, it collapses and explodes in a supernova explosion. The remaining mass that the supernova leaves over is so dense that the star begins to collapse in on itself. As a result of this, electrons fall into the nucleus and smash into protons becoming neutrons; hence the name neutron star.

This animation shows a star going through a supernova explosion. The accuracy of this animation is highly questionable but it certainly looks cool.

11. # PaperLand

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Lots of people have heard the word “superconductor.” But, not too many people really know what they are or how they’re made.

A superconductor is an occurrence of exactly 0 internal resistance to electrical charges and the removal of interior magnetic fields, known as the Meissner Effect. During this change, all magnetic flux within the material is transferred to the outside, greatly multiplying the outside field. Super conductance was discovered in 1911 by Dutch physicist Heike Kamerlingh Onnes. And, it’s actually a phenomenon of quantum mechanics.

Superconductors are made when a material is cooled to below that material’s critical temperature. And, they can break down once the magnetic field around them grows too great as well. There are currently two classes of superconductor based on how they break down. Type I superconductors abruptly stop conducting in this way if the field breaches a certain threshold value. Type II superconductors begin to accept magnetic flux back into the material above the threshold point, but retain their 0 resistivity. It is because of these quirky effects that superconductors cannot simply be seen as perfect, or ideal, conductors, but rather entirely separate phenomena.

Scientists still study superconductors and their applications in depth today. In 1986 ceramic materials were shown to have very high critical temperatures, ones that were theoretically impossible, and were dubbed high-temperature superconductors.

Nowadays superconductors are used in particle accelerators and mass spectrometers due to their incredible power as electromagnets. However, they have all kinds of fascinating circuitry and quantum mechanics applications. Feel free to investigate yourself, but for now, enjoy a video of a superconductor floating above a magnet, known as quantum levitation.

12. # mitchell44's Blog

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ever play with a slinky by pushing it down the stairs? well that's not all you can do with slinkys you can learn about waves with them. if two people hold each end of the slinky then move the slinky up and down then you can see a transverse wave that is a mechanical wave to because it have a medium (the metal). You can create all types of frequency's and amplitudes by either moving your hand up and down faster or slower. another wave you can see is a longitudinal wave by pulling the slinky together then letting go. you will see that the wave moves in the same way the velocity does. it doesn't move up and down it moves side to side. so next time you play with a slinky try to create some waves because you will be able to learn something's while having fun!

13. # Patricks Blog with friends

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you probably always woundered how we could see out of our eyes. At least EYE always have..... of course there has to be some sort of physics to it right? well of course there is and refraction is there to prove it. Refraction is the phenomenon which makes image formation possible by the eye as well as by cameras and other systems of lenses.

Most of that refraction in the eye takes place at the first surface, since the transition from the air into the cornea is the largest change in index of refraction which the light experiences. About 80% of the refraction occurs in the cornea and about 20% in the inner crystalline lens.

While the inner lens is the smaller portion of the refraction, it is the total source of the ability to accommodate the focus of the eye for the viewing of close objects. For the normal eye, the inner lens can change the total focal length of the eye by 7-8%. Common eye defects are often called refractive errors and they can usually be corrected by relatively simple compensating lenses.

Light that passes through the pupil opening, will enter the crystalline lens. The crystalline lens is made of layers of a fibrous material that has an index of refraction of roughly 1.40. Unlike the lens on a camera, the lens of the eye is able to change its shape and thus serves to fine-tune the vision process. The lens is attached to the ciliary muscles. These muscles relax and contract in order to change the shape of the lens. By carefully adjusting the lenses shape, the ciliary muscles assist the eye in the critical task of producing an image on the back of the eyeball.

14. # ItownEagl3's Blog

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A roller coaster typically begins with a chain and motor exerting a force on the cars to lift the train to the top of the first hill of the ride, which is also the tallest. Once the train makes it to the top and is pushed over the top of the hill, gravity takes over and it becomes an experience of energy transformation.

At the top of the hill, the cars possess a large sum of potential energy. That potential energy is equal to the mass and height of that object. After the first drop the cars lose a lot of this potential energy because of the loss of height, but they gain Kinetic energy, the energy of motion. Kinetic energy is equal to the mass and velocity of the object. So throughout the ride the initial Potential energy is just lost then gained, lost then gained until the end of the ride.

Below is the worlds tallest roller coaster, The King da-ka, located at Six Flags Great Adventure in NJ. With a height of 139m. At launch you are traveling at 206km/h. Only 10 Km/h less than a Cessna 182, a single propeller airplane.

15. # Jeremy Walther

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This week I focused on chapter 5 in Mechanics.   This included momentum and impulse, conservation of linear momentum and center of mass.

Areas that went well for me were momentum and impulse and conservation of linear momentum.  What helped me to really understand these two topics were first understand the graphs that went along with them.  This included Force vs. Time graphs showing the impulse to be the area under it.  These graphs gave me a better understanding of what I was solving for when I got to problems.

Center of mass was the topic I had the most difficulty with.  However plotting the points on a graph helped me with this as well.  The equation Xcm= (m1x1+m2x2).../m1+m2... really helped me understand finding the center of mass of different points.  Finding it for other objects such as rods however was still quite challenging.

My major key to success this week was working more with graphs.  Once I understood graphs whether it be just plotting point or graphs such as Force vs. Time, they all helped me get a better understanding of the topic I was working on.

16. # All da Physics

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The moon does some strange things if you haven't noticed! And something very strange is happening this Saturday, April 4th! A so called, "Blood Moon", is to occur that will be the shortest of the century, these are very rare occurrences that are very interesting to examine.

The blood moon occurs only when the sun, moon and earth are lined up perfectly with the earth in the middle. The earth as it lines up with the sun casts a large shadow which then envelopes the moon as it passes into the earths shadow. As it does this the moon becomes darker and eventually a reddish hue. The moon is turning red for a certain reason because the atmosphere of the earth filters out the blue light of the sun leaving only the red light to shine on the moon giving it it's signature red moon color.

This blood moon occurrence happens to be a special one though, that is because usually a blood moon occurs twice a year, but when it occurs four times, like it will this year, it is known as a tetrad.

So if a blood moon is when the moon is blood red, a blue moon is when the moon is blue right? Surprisingly no! A blue moon has nothing to do with the color of the moon unlike the blood moon. So what is a blue moon? Well it is a confusing tail.

Originally the idea was traced to the "Maine Farmers's Almanac", which stated a blue moon was the third full moon in a season that contains four full moons instead of three which is a rare occurrence. But the idea was misinterpreted by another author who stated a blue moon is the second full moon in a month with two full moons, this was published and adopted as common knowledge.

Now when you're friends start talking about the lunar cycles at the lunch table you can contribute useful information into the conversation. Enjoy your Saturday night which I'm sure you'll spend doing something other than watching the moon!

Blue moon information from space.com

Picture from toonpool.com

17. # imani2014's Blog

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Drifting is when a driver oversteers,or the car exceeds its tire's limits of adhesion, to cause a loss of traction in the rear wheels, when the rear slip angle of a car is greater than the front slip angle. In doing so the front wheels point in the opposite direction of the turn, the car is going left but the wheels are pointed right. Every time we turn a vehicle we resist the change of direction due to Inertia. Simply put, inertia is the amount of resistance to a change in velocity or momentum. Newton's first law of motion connects to this because he said that an object at rest stays at rest or continue with constant velocity unless acted upon by an outside force. So an object will continue as it was unless some external force comes in and messes everything up. Inertia is most often masked by effects of friction and air resistance both decrease speed of moving objects and gravity.The friction between the tires and the road and allow the front wheels to break traction. Turning the steering wheel in the opposite direction, intertia of the car that is trying to slide in the opposite direction is added to the force applied by the engine and the friction of traction between the tires and the road. If the car is front-wheel drive, the rear tires weigh less so they break traction first which causes the rear to slide out. Lifting the throttle makes another weight transfer and enables the rear wheel to weigh even less. Such physics was applied in the movie Fast and Furious: Tokyo Drift. the main character had to master the physics of drifting to beat the antagonist. This called from some amazing racing/drifting scenes. Physics is everywhere whether we acknowledge it or not. But be careful when trying to drift - no saying that you should try, honestly I can't stop you- if the center of gravity is too high you will roll over instead of sliding.

Drifting scene from Fast and Furious: Tokyo Drift :

Learn to drift:

18. # Just Some Thoughts on Physics

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About a week ago, I walked down into the basement to check on my laundry only to find a large puddle of water on the floor. We had temporarily fixed the pump that brings the water from the basement up into the septic but it seemed to have broken again. We need pumps for appliances below our septic tanks because the water does not have the ability to move from low to high (high being the location of the septic tank; low, my basement) without an external system doing work on it. Because of gravity's natural pull downwards, water wants to go down. To go up the pump must create power to do the correct amount of work to push the water up into the septic. Without it, the water overflows the location of the pump and floods the basement.

19. # Dat Music Kid's Blog

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Hey, do you know whose birthday it is? It is the one, the only, Johann Carl Friedrich Gauss! He was born 241years ago today! Since Gauss' Law helps us solve problems with cylindrical, spherical, and planar symmetry, I thought it would only be right to wish him a happy birthday! Thanks Gauss!

20. # Sara T's Blog

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When light is hitting you it is actually waves or particles of matter. This is because light is matter and light is waves.

Young's double slit experiment is what can prove light is a wave. He projected light through walls with two narrow slits in them. The result on the wall behind is interference patterns which shows that when the waves of light go through the slits they interfere and cross each other. This also shows diffraction which is the bending of waves around obstacles or spreading of waves when they pass through an opening. Another thing that proves light is a wave is red and blue shifts. When a star is moving very quickly at us it appears to us bluer than it actually is because the wavelength decreases.

The Compton effect proved that light is a particle because it shows that light has momentum.The photo electric effect is when light is shined at a thin piece of metal the photons knock electrons out of the metal. This shows that electrons are pieces of matter because they have momentum.

21. # Physic

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Mankind likes big things. We like gigantic iPhones, Venti Lattes, and skyscrapers. The pyramids of Egypt represent perhaps man's earliest obsessions with making big things. As children, we stack wooden blocks until they topple and injure the cat. We are a species obsessed with bigness. But how big could we build? The current tallest building in the world is pretty big, but it's miniscule compared to the towering peak of Mt. Everest. The world's tallest buildings keep getting bigger, but eventually there comes a point when it is impossible to keep building upward. Or is there? In 1895, Konstantin Tsiolkovsky proposed a structure known as a space elevator. Such a structure would begin on Earth and stretch all the way out into outer space. But wouldn't it crumble under its own weight? Normally yes, but this isn't your average game of Jenga. A structure in orbit experiences an apparent centrifugal force that increases the farther out in space an object gets. How and why demands a separate blog post, but given that parameter, a structure as tall as a space elevator would be able to support its own weight because the top section would experience a net force outward that cancels out the gravity that would cause the structure to topple. Therefore, it would theoretically be possible to create a space elevator. Unfortunately, there would still be a ton of forces involved, making most materials useless. However, scientists have postulated that carbon nanotubes might be strong enough to be used in such a project. Even so, the space elevator is a long ways away, but should it come to fruition, it would make transporting packages into space immensely less expensive. Plus, it would probably look awesome.

22. # zach_m's Blog

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When I sit on my couch and watch television (Netflix), there is a lot of physics involved. For example, I do not do any work, because I stay in the same place for hours. Sometimes I get up to go to the kitchen for food, but then I go back to the couch, so my displacement is zero. Also, sound waves, which are mechanical and longitudinal, travel from the television to my ears, which are about ten feet away from each other.

23. # Phys-X

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Not that long ago I came up with a fun project idea when I was bored. I had some spare speakers laying around and felt like a fun thing to do would to add them to my current speaker system to help fill the room with sound better. To do this I drilled small holes in the back of my current computer speakers and then connected some wire in parallel, I then ran this wire through the ceiling and then soldered the leads to the speakers. By connecting them in parallel I reduced the resistance of the circuit but I also increased the current, thanks Ohms law! I thought this was all good, but then my dad brought up a good point, would the increase in current cause the amp in the speakers to blow. To my luck it seems like it all worked out fine as a few weeks later the speakers are working just as they were before. Another bit of physics that helped me in this project is magnetism. At the back of all speakers there is a sizable magnet used to vibrate the membrane and create the frequency of the music.  I used this magnet as a form of mounting, I have ceiling tiles in this room so I just stuck the speakers to the ceiling where the metal was in the ceiling and I was done!

24. # AP Physics C Student Blog

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The most profound idea that can occur to any mind is that of the cyclic nature of time, fate and regeneration. Even though it is evident in scientific things like the first law of thermodynamics and the ultimate and imminent destiny of a cyclic universe, one needs only recognize that their apparent existence implies the intrinsic possibility that their existence, as it is in that instant, is able to recur again and has occurred infinitely many times before as it does in that moment. The permutations of thermodynamic microstates must eventually repeat themselves, creating identical states or systems. This recurrence and successive permutations also suggest a multiverse-like phenomenon where everything is comically “the same but different” trope to a T. It evokes that bit of wisdom, “The world is indeed comic, but the joke is on mankind” from H.P. Lovecraft, a figure of honor, which is the grand summation of fate and return. Every struggle against the human soul is doomed to repeat for all time, a conclusion so spectacular and significant that I believe it is truly capable of making men thoroughly mad.

Personally, I wonder how this wisdom weighs on my humanity. My life and what is essentially myself will recur in an infinite permutation of recursive universes each of an unremitting nightmare-future. I found not many people who understand this or are ready to accept it which makes me feel dry amused at the notion I am profoundly wrong.

25. # hecht0520's Blog

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A video combining the amazing lectures, clips and television shows of some of the most famous celebrities and scientists on the planet. Combine it with music and you get the best thing ever.

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