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  1. srossi14
    Latest Entry

    Did anyone else watch that show Minute to Win it? As I was trying to think of something the write my last physics blog post about I thought of one task in particular that contestants were asked to complete. The game was called “Tipsy.” To win, the contestant had to balance three soda cans on their edge by drinking some of the soda to the perfect level. The reason that this task is possible is because of physics and center of gravity. As the amount of soda in the can decreases, the center of gravity of the tilted can shifts as the weight of the can changes due to less liquid, and eventually it is able to align with the vertical line up from the balanced edge of the can. So I was going to just attach a video of the "blueprint" for the task but I found a video of a bunch of college students getting real hype about it so I decided to include that instead:)

     

     

     

  2. the Doppler effect is when the frequency of a sound wave becomes higher the closer you get to it and then the pitch lowers as it passes you again. when an ambulance is speeding down the street with its sirens on the pitch of the siren changes as it passes you. when it is coming towards you its pitch and frequency start to increase and then reach a maximum as the ambulance is right next to you. then as it drives passed you again the pitch and frequency of the siren lowers the farther and farther away it gets from you. the Doppler effect is the difference in frequency and pitch the siren makes as it passes you.

  3. We all know that gravity is the reason for things falling but nobody really knows why. We do know how to find and calculate gravity which helps us understand it better. Newtons law of universal gravitation helps to understand a little more of how gravity works. It states that any two things with mass have a gravitational force between them. The more mass and the closer they are means the more gravity they have. So all of us are pulling on everything with mass all the time but our masses are so small compared to the mass of the earth that it does not have an effect. The Law of Universal Gravitation does not just apply to objects on earth but the entire universe thats why its called universal. Using this law we can discover the gravitational force on any planet that we know the mass of before we even go there.

  4. Image result for mario kart wii rainbow road gif

    Mario Kart was (and still is) the greatest game of all time, and there is a surprising amount of physics involved – not the part about falling off the edge of rainbow road and then magically reappearing back on the track though.

    Mario Kart uses Newton’s laws. The use of Newton’s first law proves why in order to get moving you have to press a button to accelerate, and when you let your finger off the button, you don’t just automatically stop, you just slow down. Newton’s second law shows how if you use a cart with a greater mass, you need a greater force to get the kart moving with the same acceleration.

    Mario Kart also uses elastic and inelastic collisions. An elastic collision occurs when two karts run into each other. They both don’t stick together following the collision, but they bounce away from each other. An inelastic collision occurs when two karts collide and the one with the thunder colt transfers to the other kart and now the thunder cloud is stuck to the other kart.

    While Mario Kart is mostly fictional – with flying blue shells, mystery boxes, and magically coming back to life after falling off into vast darkness – there is still a lot of subtle physics involved.

  5. Working out is the act of building mucsle and exercising your body. In preforming acts of runnig lifting or endurance, you engage in a variety of physics topics including friction, resistence, energy, forces and momentum.

    For working out, the act of building mucsle demonstrates an example of resistance and or friction. When lifting heavy objects or moving in a forceful manor, it requires you to condemn in motion that essentialy tears the musles cause the force required is working out your mucsles and you gain strength when they grow back allowing you to deliver a greater force.

    In terms of energy, chemical energy is converted, therefor conserved and then transfered to the body in a new form of mechanical energy which allows you to move things and or run and exercise to get in shape. Continueing to expell energy requires more energy to keep up your endurance and allowing maximum potential to work out. By having stored energy or potential enrgy, you have the ability to move and then its transfered to kinetic energy in your work out secssion.

    In terms of momentum, bigger and more heavy objects when being lifted contribute a greater momentum against your body inhibiting a greater level or degree of diffuculty for bigger objects and will make more of an impact for you. Because of the more intensive strain it provides. Lesser momentum makes it easier to life and "no pain no gain" implies you will not see great results.

    Working out is an action that delivers wide diverse physics topics which are good to understand so you know what is happennning to yourself durring work outs.

  6. Water skiing involves many different components of physics. The fundamentals of it are based mainly on angles and gravity. When you are trying to get up, you have to make sure you keep your ski at a certain angle so that the water pushes down on the ski, creating a downward force that enables you to stand up. Once the force of the water pushing up on the ski is equal to the force of gravity pulling down on the ski, you are able to stay on top of the water.

    Tension is also involved in water skiing because the rope from the boat to your hand pulls tightly, creating tension. When the tension in the rope is constant, you will be traveling at the same speed as the boat pulling you. However, since the rope from the boat to the water skier keeps you moving in a circular path. Since you are moving in a circular path, there is also centripetal force. When the centripetal force is high, the water skier may be moving faster than the boat itself.

  7. When one plays a guitar, it is so important to remember all the physics behind it. Waves have a lot to do with the sound we hear from them. For example, without a large amplitude, it would not be heard. And when one changes notes, it changes the frequency that is heard. Because the wave is longitudinal, it needs a medium to travel through which is why in a vacuum you would not be able to hear someome playing. The pulses vibrate parallel to the wave because in a longitudinal wave thats their path.

    Also, playing the guitar has a lot to do with mechanical energy as one strums the strings. Without the physical motion of the player, there would be no sound. Overtones are a cool thing string instruments have that have a lot to di with waves, which is another physics point!

    Next time one picks up a guitar remember all the physics behind it!!!

  8. Hey Mr. Fullerton and anyone whos reading this, its been a pleasure grinding this year. Hope you enjoy this great video and maybe even chuckle a bit. 

     

  9. Football seems pretty stupid to me. Athletes line up across from eachother, then run at eachother as fast as they can. However, football is my favorite sport to watch. There is alot of large forces coliding in football. Every colision can be related back to physics. The force of anything is determind by its mass and acceleration. The larger the mass of an athlete and the more acceleration an athelete has the larger the force the athlete can produce. NFL players can produce large forces on eachother. This leads to big hits and head injuries.

  10. Reflection is the change in direction of a wave front at an interface between two different mediums so that the wave front returns into the medium in which it originated. Common examples of this include the reflection of light, sound and water waves. In acoustics, reflection causes echoes. This is why when you go to a school concert, there are those white barriers behind the performers. They are there to reflect the sound from coming from the instruments to the crowd. Acoustics also play an important role in understanding how waves behave because the angle in which the waves hit the acoustics walls, the angle remains the same as it bounces off the acoustics barrier.

  11. ncharles
    Latest Entry

    If you have ever went to see a concert, play, musical or any other performance on a stage, it is very likely that there were curtains involved. Tonight, i was partly responsible for the curtains at the IHS Talent show. The contraption that allows the curtains to move across the stage is a simple pulley system using two pulleys and a rope in-between. When the rope is pulled in one direction, it creates a torque on the pulley and causes it to spin. This spinning either opens or closes the curtain (depending the direction pulled). This contraption is also very common with close-able curtains in your home. And this is a very simple example but i realized thats some of the most simple things help the most!

  12. A slinky is an extremely fun toy if you are 3 years old, or even 73 years old! The way it transfers energy back and forth throughout it is very similar to a wave. A wave can either be longitudinal or transverse, but in this case, a slinky is like a longitudinal wave. It bunches up at some points, but then expands out with different distances between each metal ring. Waves are found in every day life such as jump rope as well. As you spin the rope constantly around, it represents half of a wave. If you were to play the "Jumping over the rope game" as we used to call it in the olden days, waves are traveling through that rope even more. As you get a steady pace on the rope, more waves are in it. If we wanted to find the speed of the rope, you could use the equation v=fh( h=wave length). You would measure the rope and then calculate how long it is and how long it would take for the wave to hit the crest 10 times. This would give you the frequency and wave length of the wave. Waves are every where and can be tons of fun!

  13. isaacgagarinas
    Latest Entry

    When I was in Jacksonville I went to a go kart place called the Autobahn Indoor Speedway. These weren't your typical go karts however. At the Autobahn the cars reached speeds up to 50 mph! Drivers have to wear helmets for safety and the speed made for some pretty intense races. There was a lot of physics involved in driving the cars. One of the most important parts of learning how to be as fast as possible was getting used to knowing how much and when to brake around turns. Braking too much will slow you down and can cause wrecks, however not braking enough can cause you to slam your car into the wall, also slowing you down and putting you at risk of wrecks. The only way to do this was through friction. By stopping the rotation of the wheels the tires then grinded against the concrete ground creating friction which is what would slow down your car. Also many forces were exerted with the bumping of cars and from running into walls. If my car ever rammed into another, the force exerted from my car onto his was the same amount of force his exerted onto mine. A lot of centripetal acceleration also takes place at all 4 of my wheels. Even if my car is moving at a constant velocity, the wheels are constantly changing direction as they spin and therefore accelerating inward. Finally the force of gravity is always constant on me and my car. Gravity exerts a force of 9.81 m/s^2, which is what keeps me and my car from flying off of the track. The Autobahn Indoor Speedway was a pretty intense go karting place and I had a lot of fun racing!

  14. BrandyBoy72
    Latest Entry

    This is an example of how magnets can be used for levitation, or hovering if you will. All this is, is simply the force of the magnet overcoming the force of gravity of the magnet and the liquid. In this way, a "hover board" would be nothing other than a force keeping something off the ground, which is just what a normal force is when you have an object sitting on the floor. However, using magnets for levitation is cool because you cannot see the force acting on the object, and the force can also be transferred through things, putting your hand between something being levitated by a magnet would not stop the magnetic repulsion, which is pretty cool to think about and even cooler to see.

  15. During a sporting event, the players are the ones expected to perform physical activities. However, within the game and the stadium, there are many other types of physics. A few examples are waves. Waves range from the stadium fans, to the sounds of the players, to the light waves lighting up the stadium. One of the most common waves is performed by the fans, but must be done with a lot of concentration and coordination. A stadium wave has most, if not all of the crowd performing a transverse wave that usually has a very long period because of how long it takes to complete. A transverse wave is a type of wave where the direction of energy transfer is perpendicular to its oscillations. The sound waves created by the players and cheering fans are classified as mechanical and longitudinal waves. They are mechanical because they require a medium to travel through, and they are longitudinal because the air particles are caused to move back and forth. Finally, there are light waves which are classified as transverse and electromagnetic. They are electromagnetic because they do not need a medium to travel through , and are transverse due to the same reasoning as the stadium waves. There's a lot of physics within sports and the players, but the rest of the environment contributes to physics as well, as much, if not more than the actual players.

  16. Crossbows are a very a cool weapon. They use tension and potential energy to shoot arrows. You first pull the string back, which requires a large amount of force, lock it in place with the spring system and then pull the trigger which drops the lock and sends the string and arrow launching forward at a high velocity. When the string is pulled back and locked in place, potential energy is built up. The more potential energy that is built up, the faster and stronger the arrow will launch once the trigger is pulled. Crossbows are fairly simple, yet very deadly. 

  17. In the last decade, the uprise of mobile devices with touchscreens has been prominent, and there are 2 main types of touchscreens. The first, and cheaper style, is known as resistive, which uses 2 separated films that when come in contact they allow current to flow. This is what is used to determine the location of the touch, as wherever the current is flowing is where the user is currently touching. The issue with this system is that it requires physical movement of the plates, meaning it can be triggered by anything pushing it together, also if it's layers are no longer even they can touch if nothing is pushing on them, causing unwanted actions. The solution to these issues is the more complicated design, known as capacitive touch. This uses a system of 4 capacitors on each corner, and when the touch occurs, based on how the capacitance changes, the computer system can determine the position of the touch. This is exceptionally useful for avoiding accidental touches, and for creating a much more durable touch surface. Also, it enables much more precision and ease of use to the user, as they don't have to physically move anything, and so there is less to go wrong. The disadvantage of this is that water and anything else conductive greatly reduces the accuracy and usability of such a touch screen, as it messes with the currents. Thanks to this kind of technology, it is much easier for us to use our mobile devices with ease and precision.

  18. zlessard
    Latest Entry

    I Googled "how much force is in a single keystroke" and I'm going to trust a source that says 12.9 N. This will help me in my overall (obviously hypothetical) analysis.

    Since this is my final blog post of the year I wanted to sort of wrap it up as well as possible and somehow tie in all of my other blogs. Using an online "character counter", I found out that there are a combined 50,015 characters across my 29 other blog posts, which have an array of topics ranging from pole vaulting to doomsday to Monte Alban. Not accounting for any backspacing, 50,015 is an accurate count of all of the characters I've put into these blogs. Utilizing the accepted force of a keystroke as being 12.9 N, that means I applied an accumulative 645,193.5 N to my keyboard for the purpose of these blogs. That's over 145,000 lbs of force, which seems like far too high of a number but I'm going to accept it regardless for the purpose of making this more interesting. I now wonder what type of things I could accomplish utilizing this much force that does not involve analyzing the physics behind a bladeless fan or a Mexican resturaunt.

    I could:

    Break 230 backboards (see blog no. 29)

    Throw a football very far

    Probably jump pretty high

    Write 28 blog posts and have enough left over force to perfectly emulate the biting force of an adult Great White Shark

    Push the ground really hard and pretend that the dent was caused by 32 1/4 Ford Explorers being stacked on top of each other. 

     

    As you can see, if I could somehow have concentrated all of the force that I put into the creation of these blogs into a single motion, then I could have pulled off some of the most incredible feats in the history of mankind. But alas, the people are left with 30 thoughtful, well crafted and occasionally humorous blog posts that will some day be hanging in a digital art gallery. Oh what could have been...

    :geek:

  19. It seems like just yesterday I was beginning regents physics class, and now it's almost over. It's been a struggle, but somehow, I got through it. Since this is my last blog post ever, I wanted to take this opportunity to reflect on this year in regents physics, so here it goes.

    When I first started this class, I knew right away I was going to have a hard time in it. I have never been very good at science, but I figured since physics involves a lot of math, it would not be too bad. I was mistaken. Usually in the beginning of a difficult class, I never understand anything at first. But one day, all of a sudden, I will just automatically understand it. That never happened for this class unfortunately.

    Though this class was extremely hard for me, I did manage to learn a couple of things. There are some units I kind of enjoyed, and the catapult project was fun. A lot of the demonstrations were pretty cool too. The most valuable thing I learned this year was that your attitude can completely make a situation either better, or much, much worse. When I walked into class with a negative attitude, I never learned anything. But when I walked in with a semi-positive attitude, I actually picked up on a thing or two.

    Though I will most likely never take a physics class again, I have to say that in a way, I'm glad I stuck with it throughout this year. Dropping did occur to me a few times, but if I had, then I knew whatever work I had put into this class would have been for nothing. In life, everyone has to go through things they might not want to, but in the end, things turn out to be not so bad. As many times as I might have said I hated this class, I guess it really wasn't so bad after all. And taking this class really made me admire anyone who goes into this field, because it is not easy.

    To conclude my last blog post ever, I just want to thank Mr. Fullerton for putting up with my horrible test grades and negativity all year. Taking regents physics class was definitely an experience I will never forget, and I haven't really decided if that's a good or bad thing yet. Just kidding! Maybe.

  20. willorn
    Latest Entry

    I can already tell this post will have a lot less structure than usual.

    I've been thinking about special relativity quite a bit more than usual these past few days, in particular, the twins paradox. We didn't discuss it, but it seems to me that the actual aging is not the paradox involved, but the question of which twin aged how much is the paradox, since the earth twin would believe the other twin to be 40 years older and the space twin would think himself only 4 years older. Secondly, we discussed that special relativity applied to objects either in constant motion or at rest. In other words, objects in an inertial frame of reference.

    That being said, the brother traveling in the spaceship must have experienced some sort of acceleration throughout his journey, when he left earth for example, and most likely when he turned around and when returned to earth. Therefore, I do not even think that the laws of special relativity apply to this situation. The question then for me is in that situation what would happen?

    I imagine that the twin on earth has aged physically by forty years and that the twin who traveled has aged physically by just four years, and that no paradox exists at all.

    Something else I have been thinking about: E=MC^2

    I never truly understood the principle, so I looked online for the experiment used to determine this formula, and then attempted to derive it myself. I found that a useful experiment to reference (although theoretical) is this: a box is stationary in a vaccuum. A photon moves through the box from left to right. Since a photon technically has momentum, the box must then move left in order to conserve momentum of the system. When the photon reaches the right side of the box, the impact causes the box to stop moving.

    However, since no external forces acted on the box, its center of mass must be in the same position as before (new concept for me!) but the box has moved left. Therefore, Einstein determined the photon must have a mass equivalent in order to satisfy the laws of physics.

    I dreged up an equatin devised by Einstien to get started. I wonder if he came up with this expression before or after he determined that E=mC^2, because that would make this post seem rather silly. Since, a photon is massless, I was able to draw a simpler conclusion from his equation.The momentum rho is the momentum of both the box and the photon, by conservation of momentum.

    gif.latex?E^2=\rho ^2C^2+m^2v^2 \Rightarrow \rho=\frac{E}{C} \Rightarrow mv=\frac{E}{C}

    Running low on ideas, I nosed around some more, and found that I should start thinking about the time it takes the photon to move from side to side. That train of thought led me to the following. The key is that velocity is change in displacement over time and that the time the photon required to cross the box is the length of the box side over the photon's velocity.

    gif.latex?m(\frac{\Delta x}{\Delta t})=\frac{E}{C} \Rightarrow\Delta t=\frac{L}{C} \Rightarrow m\Delta x=\frac{EL}{C^2}

    Thanks to what I learned this year in class, I know the center of mass of a system can be expressed the sums of products of mass and displacement of all individual parts over the sum of all individual masses.

    I determined that if the center of mass did not move, then the position of the center of mass must have been in the same position as the box after the system resolves itself.

    gif.latex?\overline{x} = \frac{Mx_{1}+mx_{2}}{M+m} \Rightarrow \frac{Mx_{1}+mx_{2}}{M+m}=\frac{M(x_{1}-x_{after})+mx_{2}}{M+m}

    We can substitute X2 (the displacement of the photon) to be L the length of the box because it traveled the full length of the box.

    gif.latex?M(x_{1}-x_{after})+mL = Mx_{1} +mx_{2}\Rightarrow -Mx_{after} = mL

    Reviving the previous equation created and substituting it for m(delta x):

    (I can do this because although the expression reads differently, the displacement after represents the displacement of the photon after colliding with the box's side, and the Mass is of the same object in both cases)

    gif.latex?mL = \frac {EL}{C^2} \Rightarrow E = mC^2

    I find that deriving an equation always helps me to conceptualize it, and I hope this derivation helps you too! In my probing I also discovered that all mass has a measurable frequency, although it has little or no effect on people. More on that later...

  21. Welding, as most people know, is when you use a torch to melt a material to another material, as well as add some filler material for strength. However, there are a lot of different welds that can be made, and a lot of different ways you can make them. For example, some common types of energy sources for welding include a gas flame, lasers, electric arcs, electron beams, ultrasound, and friction. For the purpose of this post, I'll be talking about laser welding, since it is newer, and involves lasers which are just inherently cool. Welding using a laser beam consists of a concentrated laser beam, which provides a lot of energy making a weld fast, deep, and within a small area. Because of the extreme heat of the laser, however, some materials can be prone to cracking. It is also important to focus the laser properly, as the weld is the most effective when the focal point is just below the surface of the material being welded. Laser welding also has some advantages over electron beam welding, primarily that it can be done in air and is not required to be done in a vacuum, and does not produce x-rays. Welding is just one of those things you dont think about that much, and don't realize how important it is to so many every day things, and it is really cool that innovations are still being made in welding to adapt new technologies, such as lasers, into a hundred year old proscess. 

     

  22. Guest
    Latest Entry

    I was doing a little research this past weekend on Richard Feynman and came across a speech that he gave at a meeting of the American Physical Society in December of 1959. Of course, Feynman did many great things but I want to focus solely on this speech which basically foreshadows the amazing things that we would be able to do with nanotechnology. You can read a copy of the speech here, http://www.zyvex.com/nanotech/feynman.html , but I thought I would point points that were most memorable to me. Feynman discussed the concept of writing 24 volumes of the Encyclopedia of Brittanica on the head of the pin. He announced that it would be possible if it is demagnified by 25,000 times and each dot is readjusted by photoengraving. In order to read this small print, we would have to make a mold of the lettering and evaporate gold at an angle so that the little letters will appear clearly in a silica film under an electron microscope. If all 24 million books throughout the world were placed onto pinheads, they would use up the area of about a million pinheads. I thought it was very interesting that although we wouldnt be able to read off the head of a pin, we could send books with little effort to devastated countries and underdeveloped nations. It is incredible to think that over 50 years ago, someone thought of this and to compare this idea with the progresswe have made through the years in nanotechnology.

    A very promising lead that emerged from Richard Feynman’s speech was the ability to write on a small- scale. In 1990, the image of atomic manipulation caused quite an uproar. In 1981, scientists developed the scanning tunnelingmicroscope to assist them in seeing single atoms clearly.(Keiper) The image, spelling out “IBM” in just 35 atoms, was created out of xenon atoms and was just the beginning of new advances. By picking up and placing atoms in a desired location, scientists broke through to another new level. Feynman’s speech predicted that this would be possible, as he couldn’t see why it wouldn’t work. Feynman was definitely before his time with many of the topics addressed in his speech but for this particular one, it may have been just what the world needed to get off on the right foot in research and development.

    Sorry that's so long and boring; I found it interesting :)

    [ATTACH=CONFIG]387[/ATTACH]

  23. Speakers contain an electromagnet which is a coil of wire that the current flows through. First, it starts with a battery and then moves into the coil of wire. When the magnet vibrates the air molecules start moving and create waves. The waves then produce the sound that you can hear. Also there is energy transfer in a speaker. For example, the phone has electric and chemical potential energy because its a chemical reaction that causes the electricity to flow. Chemical turns into electrical and then flows through the wire. When the energy flows through the wire, it moves into a coil of wire which has a changing magnetic field because the song changes the frequency of the wire. However the magnet has a contestant magnetic field and when its placed against the coil of wires magnetic field, it allows the magnet to vibrate and in the end it makes sound.

  24. joshdeutsch
    Latest Entry

    I watched Interstellar the other day and was surprised by the amount of theoretical physics there were. One part of the movie they mentioned magnetic fields, which are real physics, but i thought it was cool that they incorporated that into the movie to show the message. Allow we can't just change magnet fields with the push of a book none the less cool idea. Now we will get into the theoretics. The astronauts in the movie didn't experience time travel but did go through a black hole that had it's own time spand due to being in another universe. This connected to the idea that time travel could possibly be harnessed. Weird ending but physics theoretical and real were present so that was cool.

  25. This year, I really pushed myself with new challenges that were difficult, but also very rewarding. I took on the challenge of a flipped classroom and learned a new way to be a student that will help prepare me for college. While at times it was a struggle to keep up, this course kept helped me prepare for college by forcing me to work on my time management skills. I think that I have a lot more of improvement to do on this, but I have come a long way from the beginning of the year. I think before I go to college, it might be a good idea to review Dr. Chew's videos and brush up on some of the proper learning techniques that he taught. Another new thing that I took on this year was completing blog posts for this class. This activity taught me a lot of new things about how what we are learning in physics applies to the real world and I really appreciate all that I have learned. Going forward, I will have to apply the math and physics of the classroom to the real world, and doing the blog posts gave me a little bit of insight into the connections between the two. Although it may have been a challenge at times to complete the necessary blog post on time, I enjoyed learning new things about the world around me. 

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