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  1. 3 points
    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!
  2. 3 points
    As advised by Mr. Fullerton, I did the Coat-hanger bubbles experiment to further understand flux! Pre-experiment preparation: First, in my closet I found a nice metal coat-hanger suitable for the trial. After attempting to reshape the coat-hanger, I learned that my hangers are very strong, or that I lack strength; so, I went to my brother's toolbox and grabbed pliers to help bend the wire into a slinky-like shape. My coil ended up having four turns. I then ventured into my kitchen to fill the sink with soapy water. With the bubbly solution complete, I was ready to start the experiment. The experiment: I dipped my wire coil into the water, and slowly pulled it out. I found that the bubbles didn't form well to the structure. So, I compressed the coil by pushing the turns closer together. When I tried again with the compressed coil, the bubbles formed nicely between each turn and along the outside of the coil. The formation of the bubbles between each turn demonstrated how the number of turns matter when calculating flux. Therefore, the more turns, the greater the flux. Hence, the equation for magnetic flux is: N=number of turns A=area within one loop B=magnetic field =angle between magnetic field and positive normal direction Everyone should try this experiment before the test on Wednesday!
  3. 2 points
    I played dodgeball too!
  4. 2 points
    The reason why you get shocked more in the winter is because everyone has their heaters on which draws the moisture out of the air which causes the charges to build up and cling to us more since there is less moisture in the air.
  5. 2 points
    ...(But probably not.) In light of the holiday season, I bring to you a Christmas-themed blog post, with a pinch of love and some hints of gravitation. I came home from school today and stepped into the living room, astutely noticing that the Christmas tree had fallen. Obviously, the first thing that ran through my mind was that gravity did this. I mean, gravity's everywhere - it's a pretty likely culprit. You may or may not notice the lamp just above where the tree fell, but I believe it to be of great importance in this investigation. I have deduced that, at any time from 10:00 AM to 2:00 PM on Tuesday, December 16, the gravitational attraction between the tree and lamp created a gravitational orbit that forced the tree out of its holder, and onto the cold ground. Let's take a look. First off, the tree had to begin in static equilibrium - it was still at first. Due to Newton's first law, an outside force had to act upon this tree, and I do believe that the placement of the lamp near this tree provided an IMMENSE GRAVITATIONAL FORCE. So let's dive in. We know that the magnitude of this force is given by GMm/r^2, where G is a constant, M is the tree, m is the lamp, and r is the distance between the two. G = 6.67E-11 Nm^2/kg^2, we know this. The average mass in kilograms for a Christmas tree is about 70 pounds at this height of tree, or 31.75 kg. The mass of the lamp is about 8 pounds, or 3.63 kg. I can already see this force is about to be massive. And the distance between the center of mass of the tree and lamp? About 5.5 feet, or 1.68 meters. Time to calculate. F = [(6.67E-11 Nm^2/kg^2)(31.75 kg)(3.63kg)]/((1.68m)^2) Therefore, the force due to gravity is a whopping 2.72 NANONEWTONS. This incredibly large force undoubtedly caused the displacement of the tree; therefore, gravity ruined Christmas. You may be subconsciously pointing out the holes in my story, like how did a gravitational orbit just occur if the lamp was there the whole time, or perhaps just pointing out the fact that two objects on Earth will likely only apply negligible forces to each other. Fair enough, but keep in mind that there is absolutely no other worldly explanation for this phenomenon. So it's either gravity, or ghosts. You decide. Or maybe the cat just knocked it over.
  6. 2 points
    Physics is involved in pretty much everything in life. Throughout my school day I experience all kinds of physics. First period I have Italian where I sit down (along with the rest of my classes) and I am applying a force to the chair and the chair is applying a force to me because of Newtons third law. Second period when I get my math test score back I hit my head against the desk which is also applying a force to the desk and the desk applies one right back. Third period is art class where I gravity is pushing my eyelids down while I struggle to stay awake. Fourth period is APUSH which could be compared to a black hole. Black holes have tons to do with physics. A black hole is a point in space with so much gravity that not even light can escape and that is most definitely APUSH... Fifth and 6th periods are the best of the day because I do not have classes these periods so I can do my homework. Seventh period is English where I push down on my pencil and it leaves a mark on the many papers I have to write. Gravity also pushes down on that pencil. Eighth period could be the first period of a double for physics or if I am lucky its gym. In gym there is so much physics. A ball is thrown and is a projectile motion. Gravity acts on the ball at all times. If were running in gym we push down on the ground with our legs and the ground pushes us back allowing us to run. And then ninth period, well there is too much physics in a physics class to list. Tons of gravity throughout the day and tons of newtons laws. Crazy..
  7. 2 points
    So if you haven't heard, a rocket that was supposed to bring supplies to the International Space Station (ISS) exploded on October 28. Here's a short article and video talking about it: http://www.wired.com/2014/10/antares-rocket-explosion/. Obviously, this kind of sucks. The rocket cost about $200 million and now most of the supplies won't make it to the ISS. However, explosions are still really fun to watch, especially one that big and I don't feel bad saying that since the rocket was unmanned. Also interesting is that the rocket was made by Orbital Science, under contract of NASA. This shows that the space industry is slowly because more of a private industry with Orbital Science and SpaceX leading the way at the moment. They aren't sure exactly what caused the rocket to fail, but the actual explosion was caused by the self-destruct being purposefully activated. The real problem was right when it fired its first stage - you can kind of see this in the video. As soon as this problem was noticed, it was decided to destroy the rocket before it reached a populated area and could potentially cause damage. Any number of factors can mess up a rocket launch; there are a lot of variables. Wind speed and direction, an area clear of people, weather, calculations, etc. I think the biggest things I learned from this are that those errors we usually don't account for in our physics labs (FRICTION!!) matter a lot in the real world, and that we still have not perfected going to space. I'm excited for space tourism anyway.
  8. 2 points
    I'm jealous. I remember when i had time to play some of these. Instead, last night's excitement include an episode of Sofia the First "The Emerald Key" -- some great dramatic tension at the end -- coupled with a trio of Elmo songs and reading two chapters of the third installment of the "Princess Tiara" book series.
  9. 2 points
    I never thought I'd have to say this, but I feel really excluded by all of the video gamers.
  10. 2 points
    So are you saying that in one of these dimensions you're actually good at super Mario??. Fascinating stuff Jake, and don't go putting your cats in radioactive boxes, alright big guy?
  11. 2 points
    Hello, my name is Max and I'm a senior in high school. Since everyone else is talking about the sports they play...I will too. My mother often asks me to stop playing tennis because it is such a physical sport, but I rarely listen to her so I continue to play at a varsity level. I can't have any pets except a boring fish because my dad is allergic to the fur on cats and dogs. At the moment I work at a restaurant called Hose 22 and I usually prepare food. I'm taking physics because it was recommended to me by my counselor. But I am excited to start physics because it looks like its going to be very different from all the other science classes. I also really want to learn more about the different forces that can act on objects.
  12. 2 points
    Jelliott, I can really relate to your analogies. I too wish to become a beautiful butterfly, to grow and grow until I burst with knowledge. although I find some of your post humorous as intended, I think you struck on very important ideas. I think hard problems can be torture but on the other hand, that makes them that much more rewarding when completed.
  13. 2 points
    If you wanted to, you can change your name and remove your last name in the settings! Enjoy physics!!
  14. 2 points
    Good Evening Folks, I've received quite a few requests over the past couple months, and especially the past couple days, asking if I knew of an "outline version" of the AP Physics 1 learning objectives, essential knowledge, etc., organized by topic. I already had this created from working on the AP Physics 1 Essentials book as a chapter outline/roadmap correlated to the new AP 1 course, but had never bothered to put it in a user-friendly format to share. Well, until yesterday. Here it is: http://aplusphysics.com/educators/AP1Outline.html/ I understand this may not be the order in which you'd teach the topics, but for me at least, this organization is much easier to wade through and make sense of than the current AP Physics 1 and 2 Framework document (in which I get easily lost in the 200+ pages). Perhaps it will be of use to you as well. Please note that you can drill down by clicking on the triangles to the left of the topics, it's quite a big document if you expand it all out. I'm planning on doing this for AP-2 as well, though I probably won't have a chance to start on it until late July. Make it a great day! Dan Fullerton
  15. 2 points
    Maybe I'll write a post just about cows...*suspense*
  16. 2 points
    Sweet blog post. If you wouldn't mind spreading the love and also buying your two student teachers silver Porsches, we wouldn't complain
  17. 2 points
    Soooo, because this is my last blog post for this year ( ), I thought it would be fitting to do a course reflection on the AP-C physics class this year. I thought I'd do it in a "bests-vs-worsts" top 5 format, kind of like you could find on collegeprowler.com when viewing different schools. Top 5 Bests: 5.) Blog Posting [i thought this was really fun! I've never done anything like this before for a class. It brought up interesting physics applications and I thought it was fun to converse with classmates on the site ] 4.) Independent Units [As uncomfortable as I was at first, independent units forced me to manage my time, work harder than usual to learn the topic, and was great preparation for college. I feel like everyone sould experience this kind of a unit before graduating] 3.) Assigned practice problems from the readings [Assigned problems were REALLY helpful. I would've struggled a lot more than I did had I skipped doing the sample problems] 2.) Units with Lecture & book follow-up [This is my favorite way to learn things! The read-then-lecture method] 1.) VIDEOS <3 [Hands down the most helpful resource in Physics] Top 5 Worsts: ...I think this is my biggest beef. I really don't have 5 things to complain about. 1.) Readings weren't assigned [When life gets busy in the middle of the year, especially with a number of APs, sports, etc., readings are the first thing to get cut out for me if they're not assigned. Confession: when the going got tough, I would often skim or not read. I reccomend assigning readings in the future. Kids will complain, but they'll thank you when they see better grades and their AP score.] Overall, this was a successful year. A note to future students: This is by far the hardest AP course I've taken throughout high school. If you want to succeed, you must: A.) Read the textbook and do some practice problems B.) WATCH THE VIDEOS. Whether you're confused or simply want review, these are soooo outrageously helpful. It's like being in class a second time, except in 15 minutes or less instead of 42. Plus, you can skip over any sections that you feel you know solid. C.) REVIEW THE EQUATIONS AND FREE RESPONSE BEFORE THE AP. I went through most of the E&M free response questions as well as both E&M and mechanics equations before the exam. KNOW THE EQUATIONS! I swear equations and key concepts are the majority of the test when it comes to the multiple choice Qs. Any favorite parts of the year? Things you wanted to change? Post below with your opinion! ...I can't believe we only have 1 more day of physics
  18. 2 points
    PCX is a workout area that I participate at weekly with my volleyball team. We go on tuesday nights to exercise as a team. I realized while watching videos that i recorded of the exercise's how much physics was applied into each activity. The vertamax that we use for jump training is full of physics. When you use the vertamax you put on a belt with two clips on either side of your hips. You then stand ontop of the vertamax (a square flat surface) and then attach the clips to different color resistance bands. With the vertamax at PCX you can either choose to use it for jump training or leg strength by making the bands go parallel to the floor instead of perpendicular. Once cliped into the machine we are told to jump and go for maximun height. The force of the resistance bands pulls us toward the ground and makes us work harder to get higher into the air. Once we are done useing the clips we unclip the bands and then jump without resistance and analyze the height difference. The jacobs ladder is another machine that we utalize on a weekly basis. Similar to the vertamax you belt yourself into this machine and then "climb the ladder." You can control the speed of the machine with how much force you put into it. If you are working hard and pushing yourself and the machine then the output on the machine will mirror your work and move faster to challenge you. The machine is inclined at a angle so as to simulate climbing up a ladder type object The angle that it is inclined to makes it more difficult to climb. The Pull up bar is also full of physics. With three reps of eight pull ups my team is challenged to bring their entire bodies up into the air transitioning from potential energy into kinetic. We are given band to put our feet into for extra support. The rubberband like bands expand and retract to help differ our weight. The sled is yet another item that we use to work out. Notice this is not your typical snow sled. This sled is a black device that you put weights on inorder to work your legs and arms. Having the sled on the turf surface creates more surface tention and therefore more work to be done by my teamates. There are two different holds that we can choose from when using the sled. The two different holds are all about angles. The higher of the two is easier because you are able to use the machine against itself to push it across the turf. The lower of the holds means that the players body is parallel to the ground and very close to it. The force that it takes to push your legs and arms together to get the seld across the turf is increased from the higher angle hold. Basically every tuesday i have extra amounts of physics added to my day!
  19. 2 points
    My childhood, like many others, was spent watching many Disney Movies. One of my all time favorites was the Lion King- I never grew tired of it. One scene that always sticks in my mind is that once music number of young Simba and Nala and, of course, the scene of Mufasa's Death. (0:49-1:20) It can usually bring tears to even the toughest of teens, yes? As a child, this scene really never bothered me and, now, this sad scene seems to bother me so much more. Mufasa died a heroic, and untimedly, death by saving his only son. However, we should move onto the Physics now. How accurate is Mufasa's death, exactly? Could a fall from that height really kill an adult male lion? How far did he fall, anyway? It's very hard to tell but, after reviewing this scene many times I feel I can give a good shot at answering these questions. From what I can tell, Mufasa's fall lasted roughly 5 seconds (1:07-1:12ish), and started from rest before... Scar decided to be a jerk and condemn Mufasa to death. So, using the equation d=vit+(1/2)at2, knowing his falling time was 5 seconds, he started from rest, and acceleration due to gravity is 9.81m/s2; It can be estimated that Simba's father fell about 123 meters. While he seemes to be fairly high before he fell, I highly doubt that the the distance (vaguely seen at 0:50) was taller than the Statue of Liberty. Obviously, it makes sense why a Disney movie would over exaggerate the death of a character, and not care about making the Physics of a children's movie accurate. While real Lions are tough and resiliant, a fall like Mufasa's (even if less than 123meters) would still kill or severely injure an adult lion- not taking into account the stampeeding wildebeasts trampling. So, as expected, Disney's The Lion King takes little care in being realistic... It was still interesting to think about, however! And imagine how cool (at least, I think so) it would be if a childhood classic was actually completely accurate- in a physics sense (because animal's can't talk).
  20. 2 points
    Thrilled to help, and welcome to the APlusPhtsics Community! The short version... The College Board says you need to know how to derive them. Very rarely have they asked students to do so, but it has happened... This guide sheet may help with studying: http://aplusphysics.com/courses/ap-c/tutorials/APC-Dynamics.pdf Good luck!
  21. 2 points
    I have a very large interest in bees, so for my first blog post I've decided to research how bees see colors differently compared to humans. Through my research I have discovered that the color spectrum of bees is shifted when compared to the color spectrum of humans. Visible light is part of a larger spectrum of energy. Bees can see ultraviolet – a color humans can only imagine – at the short-wavelength end of the spectrum. So it’s true that bees can see ‘colors’ we can’t. Many flowers have ultraviolet patterns on their petals, so bees can see these patterns. They use them as visual guides – like a map painted on the flower – directing them to the flower’s store of nectar. Some flowers that appear non-descript to us have strong ultraviolet patterns. Being a bee doesn’t necessarily mean you live in a more colorful world. Bees can’t see red – at the longer wavelength end of the spectrum – while humans can. To a bee, red looks black. Humans see light in wavelengths from approximately 390 to 750 nanometers (nm). These wavelengths represent the spectrum of colors we can see. Bees, see from approximately 300 to 650 nm. That means they can’t see the color red, but they can see in the ultraviolet spectrum (which humans cannot). Bees can also easily distinguish between dark and light – making them very good at seeing edges. This helps them identify different shapes, though they can have trouble distinguishing between similar shapes that have smooth lines – such as circles and ovals. Vision is important to bees, because they feed on nectar and pollen – and that means they have to find flowers. Bees can use odor cues to find a perfect flower, but that only works when they’re already pretty close. Vision is essential to help the bees find flowers at a distance. A bees Vision in responce to different colors: Red -> black Yellow -> yellow-green Orange -> yellow-green (darker) Green -> green Blue -> blue plus ultraviolet blue Violet -> blue plus ultra violet Purple -> blue White -> blue green Black -> black In conclusion, bees have a very unique color vision.
  22. 2 points
    Yay coat hanger! I hope you don't mind, I posted on this topic too but cited your blogpost in it. Nice work here
  23. 2 points
    11/10 already and all i've read was the title.
  24. 2 points
    While I was pouring ice cold lemonade for myself, I wondered-- "What would happen over time if I waited for a cup filled completely to the brim with ice to melt? Would the water spill over the cup as the ice melted? Or would the ice just melt leaving the cup still completely filled to the brim with no spills?" Huh. I had to test this out. I decided to use a cup filled with ice, and slowly poured water to the exact brim of the cup, and left a napkin under to see if the water would spill over after the ice melted. This was not enough for me. What if the cup were filled with ice and grape juice? Or ice cube grape juice filled with water? Or ginger ale? Or milk? I was curious. I tested these all out, only to find I was wrong in my original hypothesis. I was sure I'd come back to my kitchen a pooling mess of water, milk, grape juice, and ginger ale, but I was very wrong. I had three cups of perfectly filled glasses completely filled to the very very tippy top, like no other cup has even been. It was amazing. I realized something was up with water. These things called hydrogen bonds really mess with us chemist and physicists. Why? Because they can. In liquids, molecules slip, side, bond, break and reform. However when the water turns to ice, the molecules are rigidly bonded. This creates more empty space between the molecules when the hydrogen atoms bond together so rigidly and thus frozen water occupies more room. It is also less dense than liquid H2O because of this space. This is why ice floats in your Sodas. Or why in the winter-- better known as the constant weather in Rochester-- lakes and ponds freeze at the top and not on the bottom. Because ice is less dense due to H2O's molecular structure of Hydrogen bonding (positive to negative --oppositely charged ends of the water molecules-- creating space). Solid ice takes up more space than the liquid state of H2O. You would think that water would behave like every other substance from liquid to solid-- that the molecules would become denser and more compacted-- but no, it does the exact opposite. Because water is tricky, and that's why we drink it. You may be wondering why the milk and grape juice? Those are mostly water based as well, that is why. Due to the change in thermal energy, we all know that the water transferred energy from the high temperature (water) to the low temperature (ice). This is the second law of thermodynamics. It is also considered an energy heat flow. As we know, this happens so that this water glass can reach a happily balanced equilibrium. This is why ice melts. Even milk ice. The energy in the glass is never destroyed; the first law of thermodynamics tells us energy is conserved. Here are some cool links (pun intended) on ice and why it is less dense than its liquid state of H2O. (Also why it would not spill over a glass even when filled to the brim and left alone for an hour or so.) Not all science experiments have to be messy. http://www.word-detective.com/howcome/waterexpand.html
  25. 2 points
    Glad to hear you were able to get that coathanger bent and see the continuous shape that the solenoid makes with the soap bubbles!
  26. 1 point
    Bonus $20K to team BCD for the Kerbal Royal Wedding Painting!
  27. 1 point
    Baby Powder Onix Now, what about the density of Steelix?
  28. 1 point
    Absolutely fantastic post, and I love the jumper from Stanley -- that's how you serve aggressive!
  29. 1 point
    You can do it Mady!
  30. 1 point
    Back squats are my fave as well... but 405. Still amazed, though, even for a movement that looks so simple and like it just requires raw power -- just how much technique plays a role in hitting that personal high lift. I was capped in the 360 range until I adjusted my foot position and hand position just a tiny bit, then all of a sudden 400 was in reach. Applying the force at just the right spot to maximize your efforts is SOOOO important!
  31. 1 point
    Welcome to APlusPhysics -- hope your studies go well this semester!
  32. 1 point
    That perspective of not only looking at AP-C as an opportunity for increasing your physics understanding but also a place that will equip you with experiences that can be applied elsewhere in life is fantastic! The same lens you use to apply physics to real-life problems is so useful no matter what you do. Failing definitely happens, whether large or small; just keep that perspective of learning from those mistakes and using them as opportunities rather than barriers. Often you'll find that it was better to fail once and succeed the next time!
  33. 1 point
    The European Organization for Nuclear Research known as CERN was founded in 1952. Since then more than 80 countries have been contributing to the research done in the particle accelerator and trillions of dollars have been invested. Many argue that the money spent could have been invested in humane projects rather than spending it on research of tiny particles in huge machines under the ground that go through multiple countries. But most of us don’t know the great benefits the research provided us in the past years which greatly justifies this investment. The research provided the discovery of cancer therapies, monitoring nuclear waste, helps to save tons of electricity in power transmission, the discovery of the MRI, and the greatest of all a better understanding how our Universe works.
  34. 1 point
    Awesome! so glad you had so much fun Marg!
  35. 1 point
    This is a long post, I suggest you shorten it up and spend more time playing with hamsters.
  36. 1 point
    This was a very Madge post and I loved every second of it... Bravo.
  37. 1 point
    You're reading this blog post, which means you're alive. Good. I'll begin by assuming that you believe you're living on Earth as of now - a reasonable conclusion to draw, I suppose. But what if I told you that we were nothing but computer-generated simulations, living in an artificial world? I doubt you'd be very willing to believe me, and I don't blame you - it's an impossible thing to prove. Well, nearly impossible. To get a little philosophical on you, since the beginning of philosophy itself many have speculated that our reality is nothing but an illusion - something fabricated by our own minds. Obviously, it seems ridiculous to assume that we are just simulants, artificial intelligence living in a digital world, but this is in fact a theory. The modern form of this simulation theory was postulated by Nick Bostrom, philosopher at Oxford University, in the aptly named paper, "Are you living in a computer simulation?" He states that, due to the enormous computing power that humanity will likely develop in the future, it is more probable that we are simulations, living in a world generated by "posthuman" technology, than the belief that we are carbon based organisms inhabiting the "real" universe. This seems like an absurd claim to make, but he does use several probability calculations to back this claim up. This theory corresponds with the "holographic principle" which implies that our three-dimensional Universe is a hologram/illusion, projected from information encoded on a two-dimensional chip. But sane people have criticized this argument on the grounds that such a computer, with the power to artificially create our Universe, would have to be larger than the Universe itself, and would require more energy than the entire Universe has. Which is a valid claim - but as others quickly pointed out, it would take a heck of a lot less computing power to create an "imperfect" Universe, where the simulation is just good enough to fool us into thinking it's real. In other words, parts of the Universe would only be programmed as we observe them - like, for example, far-off galaxies only exist while we simulants are studying them with scientific equipment. And the second we look away, it's gone. This is reminiscent of solipsism, where things only exist as we observe them. Of course, this again delves more into philosophy. Yeah, it's a creepy thought, and it lies just at the border of physics and philosophy. But don't let it worry you too much - I'm sure we're all real. -Simulation complete-
  38. 1 point
    Really cool!!!!!!!!!!!!!!!!!!!
  39. 1 point
    In my soccer team's sectional game, there were many examples of Newton's 1st Law. For instance, when the ball was rolling towards me, I kicked the ball in the other direction which demonstrates Newton's 1st Law that an object in motion will stay in motion unless acted upon by a net force. My foot acted as the net force as I stopped the ball from rolling towards me, and I kicked it in the other direction. Also, as I kick the soccer ball, my foot exerted a force on the ball, but the ball also exerted a force back on my foot. This demonstrates Newton's 3rd Law which says that all forces come in pairs and that each object exert a force on each other which is equal in magnitude and opposite in direction. Friction also plays a role when playing soccer as well. As the ball is kicked along the turf, the turf creates friction against the ball. Friction opposes motion for an object, being the ball, sliding across another surface, which would be the turf.
  40. 1 point
    In the spectacular finale to Buzz Lightyear's famous 'flight,' he lets go of the ceiling fan to free fall onto Andy's bed. Please. Consider the following: In my previous attachments, I used practical numbers, but not that would launch Buzz up to grab ahold of a ceiling fan 7m above the ground (which is the average height of a bedroom). So bare with me as we use that as his starting position now and still consider 2.426 m/s his initial velocity. Using the rest of my long-ago decided upon heights, I will now find Buzz's final achieved velocity before he sticks the landing in front of all the other toys. Tangentially, Buzz will free fall from a 7m height to a 1m height (the bed) ergo a change in height of 6m. Y-DIMENSION: y = 6m Vo = 0 m/s Vf = 0 m/s a = 9.81 m/(s^2) t = ? X-DIMENSION: Vo = 2.426 m/s Vf = ? a = 0 m/(s^2) t = ? To find time, we use the free fall equation in the y-dimension. t = [(2y) / a] ^ (1/2) t = [(2(6)) / 9.81] ^ (1/2) t = (12 / 9.81) ^ (1/2) t = 1.223 ^ (1/2) t = 1.106s Now we have, in the x-dimension: Vo = 2.426 m/s a = 0 m/(s^2) t = 1.106s And as an equation we know that: Vf = Vo + at So plugging in...huh. Acceleration will again cancel out. So the final velocity will AGAIN equal the initial. 2.246 m/s? Or at this point - really ANY velocity you end up with, based on actual measurements, will tend to remain generally constant over the course of Buzz Lightyear's crazy journey! Yet, we can put it all together and realize that this entire journey still did only expanded over the length of one bedroom and a one minute long Pixar scene! So I guess that's more believable than not. That's distance is 'x.' x = (Vo) (t) + (1/2) (a) (t^2) x = (2.246) (1.106) + (1/2) (0) (1.106)^2 x = 2.484 + 0 x = 2.484m That's it! Four aspects of fzx in 2.484m! But more importantly, four aspects of fzx in Toy Story! And that's all that really matters. To me, anyways "I'm packing you an extra pair of shoes; and your angry eyes, just in case." ~Mrs. Potatohead Sometimes, I find fzx extremely frustrating and slightly maddening. But it always pays to walk the distance. I guess that's all I've got to say on this childhood classic. But I'm sure I'll be BRAVE enough to examine another Pixar movie, quite soon
  41. 1 point
    No, not that 5th dimension. I'm actually here to talk about five-dimensional space, not soul music - but regardless, I hope this piques your interest. Last post, I researched the 4th dimension, and attempted to break it down in a concise, easy-to-understand, yet informative manner. This is pretty much impossible to do, especially throwing a new dimension into the mix; so again, you'll have to look for yourself to get a more comprehensive view. (Known as a 5-cube) Several branches of physics, namely particle and astrophysics, studies and debates whether or not the universe we inhabit is, in some way or another, five-dimensional. Essentially, the 5th dimension is a hypothetical dimension beyond the three spatial dimensions which we know, and the dimension of time brought to us by relativity. Several theories were developed around such a dimension; for example, shortly after the theory of relativity came into fruition, an extension of it emerged concerning the 5th dimension. It was developed over the course of two decades, and was known as the Kaluza-Klein theory. Initially, it unified gravitational forces with electromagnetic forces - then Oskar Klein came along to give this theory a quantum interpretation, stating that this dimension was "rolled up" and microscopic. This "microscopic" view actually corresponds with string theory, which relies on the existence on 11 dimensions. In this view, 7 out of the 11 dimensions would be rolled up and existent only at the subatomic level. Some speculations occur in this respect - one of these being that the graviton, a particle said to carry the force of gravity, may somehow permeate into the 5th dimension or higher. This would supposedly explain why gravitational forces are weaker than the other 3 fundamental forces - strong nuclear, weak nuclear, and electromagnetic. So how should we view this 5th dimension? A "holographic principle" was put forward by Dutch theoretical physicist Gerard 't Hooft, which states that a dimension can be viewed as curvature in a spacetime with one fewer dimension. For example, a hologram is a 3-D picture on a 2-D surface, giving it the visible curvature that we all notice. Likewise, the fourth dimension would be the curvature path of a test particle in three-dimensional space. 't Hooft also speculated the 5th dimension to be the spacetime fabric - that continuum which can be distorted by large masses/gravity. A hypersphere in five-dimensional space, the volume enclosed by the set of all points in 5-space equidistant from a central point, is given by the equation , where r is that distance from the center point. (I just added this for the people like me who want to see some tangible math to break up the crazy theoretical stuff.) That's about all I have, so remember to research further if you're interested - I can't do this stuff justice!
  42. 1 point
    You're really good at guitar Peter! And I agree with your second paragraph, it really will help to view the world differently! Oh & the homework part too!
  43. 1 point
    X-country captain, nice Pete.
  44. 1 point
    "Mathematics, rightly viewed, possesses not only truth, but supreme beauty — a beauty cold and austere, without the gorgeous trappings of painting or music." —Betrand Russell Physics is, in essence, applied mathematics. It's how math applies to life, and the results thereof. And math is... beauty? That's not how one would usually think. However, there is a certain beauty to math and how everything resolves itself when it is applied. The way tree growth and snowflakes resemble fractals, light waves follow the simplicity of a sine curve, a top wobbles back and forth, light bends around a magnifying glass - heck, we learned some of these last year in physics B. But while analyzing the theory behind it, how many of us stepped back to think of the beauty? However I explain it, watching it makes it better.
  45. 1 point
    Baking and soccer are always good interests!
  46. 1 point
    Time travel is a very interesting (and highly debated) topic in physics. In the words of the doctor, "brilliant!"
  47. 1 point
    Very expensive but it looks good.
  48. 1 point
    what would be a bee's eyeview in the trap?
  49. 1 point
    Soo are you saying that if we were to find enough energy we could travel through space?
  50. 1 point
    usually, when shot at, the average person would have neither the reaction time, nor the hair strength to deflect a bullet with a braid of his hair. the mere thought of such an impulse delivered to a bullet without crushing it or harming the hair seems to go against all physics, however for those of you who have seen the movie pootie tang, starring pootie tang, you know that pootie dont need no words, pootie dont need no music, and apparently pootie dont need no physics. https://www.youtube.com/watch?v=9F8ahCk_qhY


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