Jump to content

Blogs

Our community blogs

  1. nataliebecoats3
    Latest Entry

    In July, I will be taking a vacation to the beautiful island of Turks and Caicos as a gradation present. At the resort, there are many excursions to choose from. However, the coolest one that I saw was a paddle boarding adventure through a cove with iguanas. Though paddle boarding may look easy, I imagine that there is a lot of physics involved and that it it a lot harder. The rider has to apply enough work and force to the paddle in order to propel the board forward. This can prove to be a struggle if you don't have enough force to propel yourself through the different currents.

  2. antonio_morales
    Latest Entry

    Taking a shower also involves physics in many different ways. The only way the water can get out of the faucet and turn on is using some kind of force that exerts the water upwards to take a shower. Also, the different temperatures are important too so when you are turning it to warm or cold that involves friction making it not too easy to turn it so you don't make it too hot or cold.

  3. I saw this on myth busters, and I decided, even though they said it was not possible, I can still try, or dream of trying at least. It is possible to dodge the bullet of a sniper rifle. If the sniper rifle were far enough, that is.

    When the sniper rifle shoots the bullet, 3 components travel towards the target. Light waves, sound waves and a bullet. Light is faster then the bullet and the sound. Having said that, if the sniper was far enough to have a reasonable amount of time between the muzzle flash and the sound getting to you, it is possible to get out of the way. As soon as someone sees the muzzle flash, they could get out of the way, before the sound and bullet get there.

    Having said that, DO NOT TRY THAT. it's not possible. I just needed a good story that people would read. It's possible in theory, but never a good idea by any stretch.

  4. Basketball also has plenty of physics as well. You have plenty of force from when you block someone sends a shot into the stands or dunk on someone. Also their is force from when you dribble the basketball that is how physics is incorporated into basketball.

  5. Today I rode about 3 billion elevators over the course of 8 hours. Acceleration plays an important role in elevators. When an elevator goes up a floor, acceleration is going down and when the elevator is going down a floor, acceleration goes up.

  6. It's everybody's favorite physics problem: the elevator! One does not learn mechanics without encountering the elevator problem (as far as I know). This is an interesting, sort of different take on it though.

    http://www.cbs.com/shows/scorpion/video/46616DDC-D143-4956-909B-9B31759797B6/scorpion-i-love-machines/

    I'll be honest, the first I saw this I had no idea why Walter and Toby were tying their belts to the elevator bars. But it all makes sense about 5 seconds later when a rather...well....happy Happy stopped the elevator very suddenly. The belts looped around their arms and the elevator bars keep the duo from a painful collision with the ceiling of the elevator, a fate their captors cannot avoid. By why do they slam into the top of the elevator when its acceleration is downward, why don't they hit the ground instead?

    Let's start with what we know about elevators.

    elev.gif

    So this is pretty nifty! We are looking at the "accelerating downward" one. What we know is that while the elevator accelerates downward, the net force on the person is actually upward. This occurs due to the support force of the cable holding the total weight of the person and the elevator. We know from this that the net force (F=ma) on the person is total support force minus the force of gravity on the system. Therefore the net force on the person is less than their actual weight (thus the idea of weighing less in a downward accelerating elevator). What does this have to do with our problem from the episode? Well, we know from looking at this that person doesn't actually float (as much as I'd like that to happen) when the elevator moves down, but the contact force between the person and the floor of the elevator has lessened since the normal/net force on the person is less. Now we bring in the idea of inertia. The human body, in this case will want to stay at rest with in the elevator, so we are not seeing the people accelerate upward but rather the their bodies attempting to stay in place the elevator floor "falls out" from under them (so to speak). Their bodies will attempt to remain still as the elevator moves downward in short bursts and thus they are thrown into the ceiling. Well, Walter and Toby aren't, they have their belts. Although, I do wonder how they did not break an arm or something.

    Anyways, that's all I've got to say, so thanks for reading!

  7. Justin Gallagher
    Latest Entry

    potato-battery-02.jpg

    Building a potato (or lemon or apple) battery reveals a bit about the inner workings of electrical circuits. To do this simple science experiment, you insert two different metallic objects often a galvanized (zinc-coated) nail and a copper penny into the potato, and connect wires to each object with alligator clips. These wires can be attached either to the two terminals of a multimeter (which measures a circuit's voltage) or to something like a digital clock or lightbulb. (It may take two or three potatoes wired in series to generate enough voltage to power those devices.)

    The potato acts like a battery, generating a current of electrons that flow through the wire. This happens because acid in the potato induces a chemical change in the zinc that coats the nail. The acid acts as an "electrolyte," ionizing the zinc atoms by stripping two electrons from each of them and leaving them positively charged. Those electrons are conducted away from the zinc ions through the wire and through whatever devices lie along the circuit and end up at the copper penny. From there, they join up with positive hydrogen ions in the potato starch that have been repelled there by the nearby zinc ions. The movement of these electrons is enough to power a toy clock or light bulb.

  8. ErikaRussell
    Latest Entry

    Finally the weather begins to warm up which mean it's time for flip flops! As I walked through the commons the other day wearing my flip flops, I noticed how slippery the tile floor was... luckily I did not fall! Then I thought about wearing flip flops in the winter and how often I would fall due to the slippery ice, not to mention my feet would be very cold. I came to understand just how important friction is in the winter because, without it, we would be sliding and falling all over the place. The soles of winter shoes, for example, tend to be very grippy and have lots of ridges in them. These ridges provide the shoes with a less likely chance to fall over on the ice because they create more friction. Also, there are snow tires many people buy for their cars during the winter because the roads get very icy and these tires provide more friction between the car wheels and the ices, which will prevent the car from potentially getting into an accident. Good thing car tires manufacturers as well as shoe companies took into consideration all the physics that goes into creating more friction because otherwise people would be falling and getting into car accidents more frequently. And on the bright side, we don't need to worry about this for a while since spring has finally arrived!

  9. ally_vanacker
    Latest Entry
    blog-0455550001429300378.jpgOn the show The Big Bang Theory, Sheldon goes to a Halloween party and dresses as the Doppler effect. he explains his costume to people by giving them the definition "its the apparent change in the frequency of a wave caused by the relative motion between the source of the wave and the observer". throughout the episode he also makes the noise of a car going by when people try to guess what his costume is. This noise he makes is a clear example of the Doppler effect because it sounds louder in the beginning and then fades away. This occurs when a siren of a police car or fire truck passes due to the Doppler effect.
  10. When I was playing the trumpet the other day in band, I realized that I was using physics. As I blow into the trumpet it creates vibrations that move through the air ways of the instrument. The waves come out through the other end of the trumpet and generate a sound. if I apply more force when I create the vibrations then I would be increasing the amplitude. If I press down certain keys then I can change the path that the air waves take and change the pitch of the wave which would change the frequency.

  11. Physics is used in many movies! Movies are something that I constantly watch in my life. A movie that is one of my favorites is Willy Wonka and the Chocolate Factory! Physics is constantly used in this movie when Augustus the fat German kid starts to drink the chocolate fountain and then gets sucked in the chocolate machine. If you watch the rest of the video you can see the physics in the movie!

  12. jazmine2497
    Latest Entry

    Light is invisible until it bounces of something. Light has to go through a medium such as air first, this is known as diffuse reflection. cool fact is visible light is usually defined as having a wave length in a range of 400 to 700 nanometers. also, if you put a straw in a cup with a liquid, refraction occurs. the straw appears bent.

  13. KalB
    Latest Entry

    Friday April 10th might as well have been Friday the 13th!!! Due to the very strong wind, the traffic lights on Cooper and Titus were knocked out. Unfortunately, several businesses around that area also felt the wrath of Mother Nature, suffering from power outages themselves. I work at Cam's Pizzeria as I have mentioned in my previous blog posts, and my place of work suffered from the power outage but heres the catch... only in half of our store. What does this have to do with physics you say? Well the part of our store that of course had the oven on it did not receive power. The fryers worked and of course the sub bench but nothing involving pizza. A few lights worked and a few switches didn't. Why is that?? I think it has to do with the electrical circuits. The lights that were still on probably operated by parallel circuits so they had more than one path to travel as a back up. The ones that were out immediately, like the oven, were probably powered by series circuits, and only had one path to go through, shutting the light source off completely. Eventually, (8 hours later), the power was back on. After dealing with rude customers who were not understand and turning away about 5 French foreign exchange students, everything was back to normal and we could serve pizza again. (:

  14. 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. devon000885
    Latest Entry

    I used to own a prism which split light into different colors. The prism works via Snells law. A ray of light enters the prism and it is refracted inside and seperated into the various different colors that are released from the other side of the prism. The prisms were used to show that regular light was not colorless but simply required a tool to demonstrate the various colors. There are several different types of prisms triangular, abbe, pellin-broca, amici, and compound. I hope we get to use prisms in an experiment later in the year

  16. If you have ever gone laser-tagging, then you will know that the space in which you are in has many mirrors. Why? well light can reflected off of surfaces that are flat and smooth very well. This is an example of specular reflection. However not everything reflects even if a large amount of light is concentrated upon it. Why? well it is simply that some surfaces are too rough to reflect light and so you cannot use everything around you to get your opponents.

  17. thephysicsguy
    Latest Entry

    space is very interesting mainly because of how different it is compared to earth which makes since but what's very interesting is how some waves are able to pass through the reaches of space while other waves are not able to like light waves are able to go from the sun to us with no problem but sound waves it is impossible for the waves to go through space and that is because in the world there are mechanical waves like sound would be one and that means they need a medium to travel through to carry the energy like on earth they would be air generally but in space there is no medium for it to travel through however something like light is an electromagnetic wave which means it can travel even if it doesn't have a medium this is why we are able to get light from the sun.

  18. It is quite interesting how physics can be found in such random parts of your daily life. One such example of this is sleeping. When a person sleeps, they are exerting a force on the bed that they are sleeping on. According to Newton's Third Law, the bed then exerts that same force back on to the person sleeping. In addition to this, gravity holds the person down to the bed, keeping them grounded. When I need to wake up in the morning, I set an alarm on my phone and put my ringer on high. This way, the high frequency pierces through my sleep, and wakes me up. I have never realized just how much physics is in such a simple act!

  19. Every time I get groceries with my mom I try to bring all of them in the house at once. She typically says, "You should take more trips!" But physics is on my side. It requires more work to bring in several loads of groceries opposed to just one big load. If work is a force x a distance than one big trip will require the least amount of work. To make one big load requires me to move the huge load of groceries, and myself once from the car into my house and into the kitchen. Simply taking two trips would require me to move myself from the car twice and back out to the car once. Splitting the groceries into two loads requires the exact same amount of work to move the groceries once because the force is halved but the distance is doubled. The issue of splitting the groceries into two or more loads is the work required to move myself is added. If assumed the distance is 20 meters from my house to the car and the groceries weigh about 100 kilograms then the force of the groceries is 1000N. The work required to move the groceries 20 meters is about 20,000 J. I weigh about 80 kilograms then the force of gravity is about 800N so it takes about 16000J to move myself. One trip of groceries would be 20,000 J + 16,000 J = 36,000J. Two trips would be 10,000 J(half the groceries) + 16,000 J + 16,000 J + 10,000 J +16,000J = 68,000 J. This is because I must move myself with the groceries 20 meters, then myself back to the car, then myself back inside with groceries again. By doing all of the work in one load I save 32,000 J of energy. Regardless of the load of groceries one big trip would save 32,000 J of work. It may be too difficult to carry all of the groceries at once but a load weighing perhaps weighing 20 kilograms is definitely manageable and effective in conserving energy if all done at once.

  20. Monigle123
    Latest Entry

    While re-watching Breaking Bad, or as some call it the meth show, I noticed there was a lot of physics in it. One episode that relates to a new unit we just started was season 5, episode 1. This episode (warning spoilers) is the Giant magnet episode. A short summary of what happened: “That night, Mike hot-wires the gate into the APD parking lot. Walt and Jesse drive the magnet-equipped truck next to the building to the wall outside the evidence room. The magnet disables the guard's computer, alerting the police. In desperation, Walt cranks the magnet up to its maximum voltage, sending a force so strong it tips the truck over. The police security guard finds the evidence room destroyed by the magnet and sends officers outside to apprehend the crooks, but Walt and Jesse escape with Mike, leaving the truck behind.†(Breakingbad.wikia.com). This relates heavily on physics because they constructed a giant electromagnet to create electromagnetic waves. With this they are able to destroy electronics with magnetic fields.blogentry-3421-0-40493600-1429280386_thu

  21. there is all sorts of physics in sun light. for instance the sun light we see is actually delayed and comes in waves. what happens when a reflective surface meets sun light is that the light is refracted and shines on another surface. this actually occurs on several glass sky scrapers in cities and has been known to actually melt other objects such as parts of cars because the sun light is reflected back on an object.

  22. The first law of Thermodynamics holds that in any situation the total amount of energy with in is equal to the total amount of energy out. This also means that you can't create energy or destroy it. So well what happened to all the energy we have put in our bodies? The long story short, most of the energy is stored in your body, and on average a human carries around 7*10^18 joules of energy on average. If all that energy were to release all at once, it would have the same effect as setting OFF 30 HYDROGEN BONDS AT THE SAME TIME!!!!!

  23. We all know the type of people who have never met a mirror they didn't like, get it? Well not only do they like their own reflection, but they obviously like it because of the physics that it bestows! A mirror is an example of a specular reflection because it is a smooth surface that easily allows reflection to the point of visibility.We can see how the angle at which the wave strikes the mirror is equal to the angle at which it reflects off of the mirror due to the law of reflection. And no matter what angle we use, this will always be constant! Now if something is ugly enough and the mirror happens to shatter, hypothetically speaking of course, the gravity in the shards of glass falling and the force with which they hit the floor are components of physics too! :D

  24. 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.

  • Recently Browsing   0 members

    No registered users viewing this page.

×