So I was reserving my last blog post for my momentum video I made last year. Unfortunately I couldn't find it last night. I went to Mr. Powlin today to get the video but it wouldn’t upload to the site, or to my email or Google drive for some reason. I’ll try to find the video again tonight, but if I can’t just picture me getting shot bare skin with an airsoft gun.
I figured I would finish my blog posts with a reflection of how physics went this year. At the beginning of the year, Mr. Fullerton introduced us to integrals. I had absolutely no idea what how to do them since we hadn’t covered it in math yet. Fortunately by the time they finally came up on a test, we had gotten to them and calc and I finally understood them. Overall the calculus included in the course was fairly basic and wasn’t very hard.
The independent units were definitely something new
I found an interesting article about how nuclear fallout has aided in studies on brain development. Nuclear fallout introduced small amounts of carbon 14 into our atmosphere. When our cells divide, they incorporate carbon from the environment. So the carbon 14 released from nuclear bombs eventually makes it way into the human body. This means that carbon 14 can be used to measure the age of cells. A team at the Karolinska Institute used this to show that new neurons were produced in a small part
So I read something really interesting about a particle called the “Oh-My-God particle”. Detected on October 15th, 1991 the particle was a proton that was traveling at nearly the speed of light. In fact it was traveling at 99.99999999999999999999951% of the speed of light. The proton had the energy equivalent of a baseball traveling about 100 kilometers per hour (imagine getting hit in the head and knocked out by a particle too small to see). Even the particles produced in our particles accelera
Nuclear energy has been used since the 1950s. However all nuclear power plants have been fission reactors. Fission results from bombarding uranium or other large atoms with neutrons. The atom then breaks apart releasing energy and more neutrons leading to a chain reaction. Nuclear fusion however has never been used for energy. Fusion is when two light atomic nuclei fuse to form a heavier nucleus, vast amounts of energy is produced comes from binding energy due to the strong nuclear force. Fusion
Since I’ve already done a blog on dark matter I thought why not do one on dark energy as well! Like dark matter, the existence of dark matter has yet to be proven. Despite this, dark energy is theorized to ‘exist’ in very large quantities. Current models have dark energy occupying 68.3% of the universe. So if we can’t prove dark energy exists why do physicists believe it exists? Well because it’s the only thing that would explain why the universe is accelerating. We know from red shift that the
Antimatter is a very strange concept in physics. Antimatter consists of anti particles that have the same size and mass as their corresponding ‘regular matter’ but opposite charge. For instance a positron is the size of an electron but contains a positive charge. The current theory for the universe, the Big Bang Theory, predicts that an equal amount of matter and anti matter were present at the beginning of the universe. But today, anti matter occupies a negligible amount of the universe’s compo
So I figured I’d, write about why our water bottle rocket failed so miserably on arts fest. Our goal was to use parachutes that would cause our rocket to slowly descend to the ground. Instead of using just one, we figured using two would slow our rockets fall even more. In theory this would have worked fine, however when our rocket reached its maximum height and the nose cone fell off exposing the parachutes, instead of fully opening, the two chutes tangled together and didn’t fully open. The un
Well, I thought of yet another aspect of swimming to analyze for my blogs posts!!! Sometimes at practice we use these bungee or stretch cords to work on resistance training. The premise is simple, strap one end around your self, and the around the block at the end of the lanes. The bungee cords act just like a spring in that F = -Kx, the further the displacement the larger the force. As you get closer and closer to the other end of the pool, the force pulling you back becomes larger and larger.
It seems the search to prove the existence of the elusive Dark Matter might soon come to a close. A Minnesota mine, half a mile under ground, seems to have detected the existence of Dark Matter. For those of you who don't what Dark Matter is, I'll give a brief explanation. The ordinary matter that we can visibly see makes up an estimated 15.5% of the universe. Planets, Stars and pretty much everything else in space is made up of ordinary matter. However 84.5% of the universe's matter is estimate
Reiterating Dave's recent blog post, I thought I would review what this last quarter has been like. So this quarter covered the E&M portion of the Physics C course. My general opinion is that the jump from Physics B to Physics C was far easier for mechanics than the jump for E&M. From the first two exams I learned that I was horrendously bad at the E&M free responses. I also found while taking the test, I would realize that I didn't really understand the material as well as I though
This is our second independent unit in a row, meaning we haven't had traditional class in a very long time. This one seems a bit more difficult then previous ones though. Unlike previous independent units, I don't remember much about magnetism from last year making it more difficult. Magnetism also employs more complicated math like cross products and calculus based equations then the other independent units. I found it hard to understand the textbook and the only thing that stands out from the
I found the most amazing video of superconductor levitating from a magnetic field. You absolutely have to watch this video!!! So basically a sapphire is coated with yttrium barium copper oxide. When cooled to -301oF, the saphire becomes a superconductor. The superconductor experiences no electrical resistance. For some reason the magnetic fields aren't able to penetrate because the superconductor expels fields from the inside. This leads to something called quantum locking which holds the superc
Has your hand ever been so cold that it went numb? Well how about when it was 90o and you were outside in the sun, no, well this has happened to me before. Over the summer I worked part time at clover home leisure. Part of my job was to fill up propane tanks. Normally not a big deal, but sometimes we get massive propane tanks with purge valves. While filling, the purge valve forces the air out. When tank is done filling, the purge value starts spitting out massive amounts of propane. Propane sto
The navy is developing a prototype for an Electromagnetic Rail Gun. The Rail Gun would be use massive magnetic fields to accelerate a projectile at over 5000 miles per hour. The projectiles would have so much kinetic energy that warheads would become unnecessary components to the projectile. The projectile would be able to devastate a bunker just by making impact with it, making explosives unnecessary. Clearly such a weapon would be extremely useful in a wartime situation.
The Mag lab near Tallahassee has created a 45 Tesla Magnet. This Magnet is 800,000 more powerful than the earth magnetic field. The Magnet was build by placing a coil of wire inside a coil of wire inside a coil of wire ... creating a massive magnetic field. The Magnet proved so strong that a camera crew lost half its recordings just by being in the same building as the magnet.
Have you ever wondered if physics would be applicable to your life? How can you make what you learned in physics useful? Well Physicist Dmitri Krioukov used physics to get out of paying a $400 traffic ticket. Dmitri Krioukov wrote a paper titled "The Proof of Innocence" to explain to the judge that his traffic violation for running a stop sign was the result of the officer suffering from an optical illusion. The end result, Mr Krioukov no longer has to pay the ticket!! This proves one of two th
Well i thought my last post was about the physics of pain pong(a painful variant of ping pong) was pretty crazy. Well a professor from Brigham Young University took it to a whole new extreme. Professor Harold Stokes used a cannon to launch a ping pong ball at himself at over 500 mile per hour. Now that's dedication to teaching!!!
So last night the swim team got together for some pizza and to hang out. Being highly intelligent teenagers, we decided to play some pain pong. For those of you who aren't familiar with pain pong, it is a variant of ping pong where everything you loose the point you turn around and your opponent smashes the ball with the paddle at your bare back. Naturally if your quite bad at ping pong(like me) the game can get very painful, but why? Well its because of physics, more specifically impulse!
Engineering researchers at the University of Michigan have crated a nanoscale coating that is super effective at repelling liquids. The major difference between this coating and other coating is that with other coatings, liquids with very low surface tensions such as oils, alcohols, and organic acids stick to the coating and eventually diffuse through the coating; however with this coating, even liquids with low surface tensions are repelled. After testing well over a 100 liquids, the team at Mi
So at yesterdays practice my coach made us take out the lane lines and put them on the reel after practice. As we spin the reel, the reel becomes increasing difficult to spin because the additional mass of the lane lines.
I decided it would be a great blog post to find out how much the moment of inertia changes for the reel once all of the lane lines are put on. I’m going to make some rough estimates on the dimensions of the reel since I couldn’t find them online and I can’t go in and measure
The physics of the Powertower. So as previously mentioned in another blog, on the Saturday practices we do stations. One of the stations is doing sprints with THE POWERTOWER. What’s a Powertower you ask? Well if you have ever been to the pool and seen those giant red buckets attached to the metal frame thingy, that’s the Powertower. I’ve included a picture because I’m guessing none of you know what I’m talking about.
Anyways we fill the buckets with water and a b
The physics of hypothetically cheating at swim practice. During Saturday practices, our coach has us do stations. One of these stations involves sprinting with a parachute.
As you can see the parachute is quite small but despite this, it still creates a whole lot of drag. The parachute is very thin and creates a large pocket that water gets trapped into. As the parachute is pulled through the water, the water getting caught in the pocket creates drag. Now 100% hypothetically speaking if anyone
The physics of Swim Paddles. Some times at swim practice our coach makes us use these paddles.
These paddles typicality increase how far we go with each stroke while slowing down our stroke as it takes more force to pull. This because with the paddles, our hands have a greater surface area. When we pull our arms through the water, we pull more water behind us. Based on the law of conservation of momentum, if I catch and push more water at the same velocity backwards I will have a greater veloc
The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.
APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to firstname.lastname@example.org. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.