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Everything posted by Hannah29

  1. Particle collider research funding should NOT continue. The extensive money spent on this research just to make very minimal steps toward actually figuring something out could be used for other, more concrete things. They're are some advantages to this research but they are very small and contribute something to only a specific area that isn't very helpful. Huge amounts of funding like this should go to things that are more tangible and realistic like education, paying off national debts, going to the poor, etc. Also, some of the experiments done and the tests there after pose harm to it's subjects because the research isn't on solid ground. Because the research is risky and unsuccessful for the majority of the time, and huge amounts of money are essentially wasted, the research funding for particle colliding should not continue.
  2. That's so cool that it can connect to the area of medicine!!!!
  3. 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!
  4. Last weekend I crossed the border into Toronto, Canada for a "girls weekend" with my mom and sister. Our main purpose of going there was for a yoga convention for all the yogies of the world. While at this convention, we of course experienced tons of physics! When doing different yoga poses, we experienced the great phenomenon-gravity- at work. When "ohming" or saying "namaste" we experienced sound waves, and the vibration they produced so that we could here them. But when we weren't doing yoga, we somehow still experienced physics! By dropping tons of money at the 3-story mall, The Eaton Centre, we experienced the force that our heavy shopping bags created on our arms. When taking the elevator to a new floor of designer stores, we experienced physics there and how we felt heavier when going up, but lighter when going down due to acceleration. We lastly saw physics when we hit the pool/hot tub in our wonderful hotel. The jets pushed water out creating different waves or bubbles. We also created waves by jumping into the pool. Depending on the type of jump or how hard it was, the amplitude changed all the while carrying the energy we put forth by jumping in. This weekend adventure was full of physics just like everything else!
  5. People commonly say that physics is the way we can see different aspects of math in the physical world. And this is true for many math equations explain why certain things are the way they are as well as help us identify physics "answers". Earlier in the year we learned how to solve problems using kinematics when it came to projectiles, or something basically moving. But recently in math analysis I learned a knew way to solve these problems using calculus/derivatives which makes it much easier! For example, using calculus we can identify the time at which an object is rest given an equation. Take the equation; s=3t^3 - 7t^2 - 2t and time is greater than 0 (obviously). First you would find the derivative of s; 9t^2 - 14t - 2. You would then set this equation equal to 0 because the objest is rest whe the velocity is 0, and the derivative of s (position) represents velocity. By solving the equation when set equal to 0, you do some quadratic equation stuff and come out with an answer of a time of 1.69 seconds. This is just another example of all the math in physics!!
  6. By taking 2 sciences this year, I have the pleasure of making connections between both AP biology and physics. In bio we recently started learning about genetics and the biotechnology surrounding it. One of these biotechnologies is called gel electrophoresis. In gel electrophoresis we can see the separation of what makes up DNA based upon size and charge. By giving the molecules a negative charge and then having a positive charge at the opposite end of the technology, the molecules are attracted to the opposite end and proceed to move down the technology at different speeds and to different lengths. Larger sized particles move less than smaller particles, creating a separation between the two. This separation can help to identify where an altercation to the DNA occurred and possibly further tell us about a mutation. This technology might seem simple but it's actually produced using physics and polarity/magnetism. And knowing that type of information can help improve someone's life and adjust to the mutations in the DNA....all using physics!
  7. This summer my family purchased two stand-up paddle-boards, otherwise known as SUPs. We took these boards out onto the lake at my cottage and were able to stand up in the middle of the water! Although not quite the same as surfing, you could still feel the waves underneath the board which is a huge component of physics. Every time the board went up or down it was because a pulse went through the wave. When the board went it up it was because it hit the crest, and when it went down it was because there was a trough (both equal in amplitude from the baseline). When boats would drive around where we were paddle boarding, the waves would get very big underneath because the two different waves met and their amplitudes combined to make one big amplitude (due to the law of superposition), which made it very hard to keep balance. The waves also carried energy that caused them to crash against the beach shore and make the paddle board move in certain directions. All in all, stand up paddle boarding is a fun activity for exercise or just to pass the time that involved a great deal of physics!
  8. Hannah29

    Poor Rapunzel

    I wish my hair was as long as hers! Nice physics connection.
  9. Can you actually feel the ball getting warmer??
  10. What we know as the liquid that makes up a good part of our bodies/earth, and what helps us to stay alive, is actually related to physics! (Like everything else...). We can first see some physics in waterfalls and how they race toward the ground at very strong velocitys. Why do they do this? PHYSICS!! Gravity pulls the water toward the center of the earth which we see as down because we are on the surface of the spherical planet. The momentum of these waterfalls is also great, because momentum is mass times velocity. Water has a very large and concentrated mass when it comes to waterfalls as well as velocity due to acceleration of gravity, so the momentum is huge! We can also see the physics of water in the component called convection. As commonly known, warmer water will rise as it pushes colder water underneath. This convection makes it so hot water can actually freeze faster and is a huge part of physics.We also see physics when water is in another state. As water freezes it becomes ice; a hard, slippery substance. But why so slipper? Once again, PHYSICS! On the ice there is less friction, because even though the normal force is the same there is a smaller coefficient of friction due to the nature of the surface, which all makes friction less and allows us to slide/ feel a slippery sensation. Water has many properties that keep us alive and keep our world going, but the most important fact about water is that it has a lot to do with physics (obviously).
  11. Although the title might be quite deceiving, for I have never been skydiving, it's an interesting topic that involves loads of physics! The most obvious component of physics here is the force of gravity. Without gravity, a skydiver would simply float upward instead of being pulled toward earth's center. As a person free falls, they accelerate due to gravity at a rate of 9.81 m/s^2. There is also the force of air resistance that counters gravity. Air resistance can also be considered a force of friction because it counters and slows down another force (just not traditional friction for there is nothing physical that we can see). When this force becomes equal to gravity, something known as terminal speed is reached. By using kinematic equations, we can analyze things like the speed at which someone falls or how fast they are going right before they hit the ground. This type of data instigates the question; why can a parachute prevent someone from falling essentially to their death? Well, the shape and size of the parachute creates more air drag. So if you release the mechanism at the proper time, there is enough time to allow air drag to increase, slowing down the momentum and velocity at which someone falls. Another cool part about skydiving that incorporates physics is the idea that someone can do tricks and different movements while in motion in air. By contouring one's body in different ways, the direction of air drag is changed which allows the actual body to move. Maybe someday instead of light shows in the sky, we can have people shows from skydiving!!!
  12. After being told that "physics is everything", it becomes easy to see how that is really true in our everyday lives especially regarding sports. One sports that has loads of physics and its fundamentals is volleyball. One of the main components a player needs to achieve is jumping. Whether its a jumpserve, a jumpset, or jumping to spike the ball, getting a high verticle for all of those is essential. The physics plays a role here in that the players have to "beat" gravity, since they are moving against it (gravity pulls us down toward the center of the earth, while we are trying to jump up). We also see more physics in this when analyzing verticle hight and speed through kinematics, or other means. We can determine how high we jumped and what height we would need to get too for a better swing, as well as things like the velocity of our body when at the point of contact with the ball, etc. We can also see physics components in all of the forces. When the ball is served it contacts the player's arm with the same force that our arm hits the ball with. We use this concept when "digging" a ball (passing the ball when it is spiked from the opposing team). A common skill called the "dig and pull" is a combination of a pass and the bringing back of the arms post contact. This allows the player to "absorb" the ball's momentum and make it stay on our side while changing it's spin direction. The act of doing this gives the mometum more time to slow down so that we can control the ball. The impulse is also changed. We can also see physics in the energy transfers involved with playing and practicing volleyball. The food we eat has potential energy which is converted into energy for us to use and is later shown off as sweat, etc. There is also the gravitational potential energy of the ball when it's in the air, the kinetic energy of the ball while in motion, and the energy transfers from us moving our bodies to make the ball move. We can even see physics in the wonderful thing called friction when diving for a ball and skidding along the gym floor (yay floor burns). Not only can physics be seen in volleyball, but it is widely spread through all sports, for physics is EVERYTHING!
  13. I recently got my first job working in a pizzeria and I couldn't help but find myself pondering (not really) all the possible physics involved with such a place. For example, as the pizza goes through the oven, heat is used to cook the pizza. There is a transfer of heat from what heats the oven to the pizza. Then as the customer eats the pizza, there is another transfer of energy as it is eventually used as energy to allow the consumer to do work. All of this holds to the concept of conservation of energy. We can also see physics in the different amounts of work done in order to do the job. Carrying heavy ingredients from the cooler to the kitchen, rolling the dough out, and simply grabbing the pizza to give to the customer. All of these have different work values, depending on the mass and selected distance, but it's a physics concept nonetheless. As we preform the work for all of these tasks, the energy used to do them is transferred to the object which produces the change; the relocation of ingredients, the expanding of the dough, and the customer getting the pizza. This again shows the conservation of energy. We could also go as far as to say that there is physics in when we drop something. Although we would never sell it to a customer, you could measure the velocity at which it fell using kinematics, or the kinetic energy of the object while it falls, or even the force at which it hits the ground. Even if we might not have the free time for these calculations (because it's work) it's just furthur proof that physics is all around us!
  14. It is commonly thought that the only physics that is found in instruments is the vibration that produces the sound. And even though this is very important, for there would be no sound without that, there is more physics involved in instruments that allow us to produce sound effectively; in tune. When you tune an instrument, you are adjusting the instruments pitch so that it forms a pleasing arrangement/sound that corresponds to other instruments, or the music you are playing. The physics here is exactly what pitch is: the fundamental frequency of sound. So the vibrations produce the soundwaves that we hear as sound which is measured in hertz. One of these hertz means one cycle per second, or the frequency of the soundwave. This information begs the question; can instruments be tuned using physics rather than just by ear? Well, when an instrument is out of tune it means that it's a high or low pitch. This means that the frequency of the sound is off of what it needs to be in order to sound correct. We can see this in the fact that instruments more easily get out of tune in temperature changes. When the temperature changes it can physically cause the instrument to expand/contract, making the frequency of the sound produced to be different wave lengths. So when this happens, instead of using a tuner or using the ear to another instrument that is in tune, there is potential to re-tune the instrument using a study/analysis of the wave-length and frequency of the sound. You could match the wave-length to an instrument of proper tuning using technology and a set of math skills which could change how we tune instruments in the future.
  15. Since the first day of school, it was drilled into our heads that physics really is in everything. And when analyzing different sections of science, it made me a little skeptical if this was actually true or not. When looking at earth science, you see physics in things like what holds everything on earth (gravity) which then explains how sediment falls,etc. And in chemistry, we can see physics demonstrated in concepts surrounding energy and how/what that energy is converted into, etc. But when examining it from a biology stand point, I really questioned if there could be any physics in that section. Although these connections might not be as defined, after thinking about it more I can conclude that there is physics in this as well. For example, plants use a mechanism called capillary action in order to obtain the nutrients absorbed through there roots and move it into their leaves. With the use of water and it's special properties (cohesion & adhesion), the nutrients are able to travel through the stem to the leaves and move against gravity. Without gravity, the plants wouldn't need such a mechanism, and the nutrients probably wouldn't even be on the ground. We also see physics in biology through things like sound. The sound is created through vibrations that travel through the air into the ear. From there, it goes through the ear canal until it reaches the eardrum where it'll then pass the vibrations through the ossicles to the middle ear. This eventually will allow us to convert or associate those vibrations as sound and give us the ability to hear. Taking both AP Biology and Physics this year has allowed me to study two different sections of science. But it is definitely interesting and captivating to draw parallels across two seperate entities that you wouldn't think fit together.
  16. Your catapult looks really well done!!
  17. Good connection from a black hole to US!
  18. Good job in finding the physics behind driving! Shoulda gotten me a souvenir from there tho:'(
  19. The bear shoulda won
  20. Even though Kylee and Mandy always go at it, it's cool that you found the physics in it!
  21. The instrument ukulele and the practice of playing the ukulele has a lot of physics involved. First of all when holding the ukulele there is of course the force of gravity preventing it from "floating" away, the force of my hand on the strings (both strumming and on the fingerboard) and force exerting by my hand holding the ukulele. There are also components of physics that go into playing the ukulele. If you increase the velocity of your hand on the strings, you'll get a different rhythm rather than when it is slowed down. Also, if you exert a larger magnitude of force on the strings, you will increase in dynamic and the volume will be louder (amplitude). There is also physics in the acoustic aspect of the ukulele. The vibrations of the strings create the sound that we can hear. These vibrations cause the medium or surroundings (air) to vibrate which are traveling waves and that allows us to hear the sounds. Although this can apply to most string instruments or sounds in general, the ukulele is obviously the best
  22. Having turned 16 on August 29th of 2014, I got my permit from the local DMV. After having driven for about a month, I took on the challenge of driving on the highway/thru-way to a dentist appointment. Although I was undeniably freaking out the entire ride, we safely made it to the dentists where they proceeded to do their thing. Now, post traumatic highway experience, I can see that there is a lot of physics not only involved in the car itself, but driving as a whole concept as well. For example, there are a variety of forces acting on the vehicle as it is in motion and not. In both circumstances, there is the force of gravity that pulls the car down as well as the normal force, or the ground "pushing back" on the car. There is also the force of friction that acts on the car both when it's moving and when it's static or not moving. Also having gone from neighborhood streets to the highway(s), the speed limits have changed. This means an increase in velocity and more acceleration (especially when first getting onto the highway...scariest part). So even though in the moment when all I could think of was not crashing, looking back, it shows that physics is a huge component in the little things we do everyday.
  23. The two methods of measuring your standing and jumping quantities and then finding the difference, and timing how long one is in the air when jumping creates a very high percentage error. We had the percentage errors of 42%, 33% and 55%. These errors could have happened by a multitude of ways. People have too slowly of reaction rates/reflexives that could accurately measure the time someone is in the air. Also when we jump we might bend our knees making us stay in the air longer. Another source of error is in the fact that when we jumped we reached one hand up to put the tape on the wall. But when we time our jumping, it’s merely a measure of how long are feet have left the ground causing an error in the two calculations. A more accurate way of getting the data would be to use a state of the art laser that measures movement. This would get rid of reaction time since it will only measure when there is movement. Using the AllyVanacker3000, students would jump and the machine will measure the time the student was moving and the distance the student traveled.
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