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Showing content with the highest reputation since 11/14/2010 in Posts

  1. 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.
  2. 2 points
    If you wanted to, you can change your name and remove your last name in the settings! Enjoy physics!!
  3. 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
  4. 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!
  5. 1 point
    That's the richest pauper I've ever heard of...
  6. 1 point
    Looking forward to reading about the launch!
  7. 1 point
    Does anyone know when the AP Physics 2 Videos are going to be completed?
  8. 1 point
    Welcome to APlusPhysics -- hope your studies go well this semester!
  9. 1 point
    Money should not be spent to furthur study Particle Colliders. The united states economy is terrible and so money should not be wasted on information that we can live about. The information obviously has important benfits. We could feed children in ghana instead of spending money on science that is not needed. The money could go towards helping developing countries to provide water and food and items essential to live. We would unfortunately not have MRI's but kids in foreign countries are more important. The research for particles colliders is just too expensive to be worth it.
  10. 1 point
    When visible light, X rays, gamma rays, or other forms of electromagnetic radiation are shined on certain kinds of matter, electrons are ejected. That phenomenon is known as the photoelectric effect. The photoelectric effect was discovered by German physicist Heinrich Hertz(1857–1894) in 1887. You can imagine the effect as follows: Suppose that a metal plate is attached by two wires to a galvanometer. (A galvanometer is an instrument for measuring the flow of electric current.) If light of the correct color is shined on the metal plate, the galvanometer may register a current. That reading indicates that electrons have been ejected from the metal plate. Those electrons then flow through the external wires and the galvanometer, providing the observed reading. The photoelectric effect is important in history because it caused scientists to think about light and other forms of electromagnetic radiation in a different way. The peculiar thing about the photoelectric effect is the relationship between the intensity of the light shined on a piece of metal and the amount of electric current produced. To scientists, it seemed reasonable that you could make a stronger current flow if you shined a brighter light on the metal. More (or brighter) light should produce more electric current—or so everyone thought. But that isn't the case. For example, shining a very weak red light and a very strong red light on a piece of metal produces the same results. What does make a difference, though, is the color of the light used. One way that scientists express the color of light is by specifying its frequency. The frequency of light and other forms of electromagnetic radiation is the number of times per second that light (or radiation) waves pass a given point. What scientists discovered was that light of some frequencies can produce an electric current, while light of other frequencies cannot. Einstein's explanation. This strange observation was explained in 1905 by German-born American physicist Albert Einstein (1879–1955). Einstein hypothesized that light travels in the form of tiny packets of energy, now called photons. The amount of energy in each photon is equal to the frequency of light (ν) multiplied by a constant known as Planck's constant (â„), or νâ„. Einstein further suggested that electrons can be ejected from a material if they absorb exactly one photon of light, not a half photon, or a third photon, or some other fractional amount. Green light might not be effective in causing the photoelectric effect with some metals, Einstein said, because a photon of green light might not have exactly the right energy to eject an electron. But a photon of red light might have just the right amount of energy. Einstein's explanation of the photoelectric effect was very important because it provided scientists with an alternative method of describing light. For centuries, researchers had thought of light as a form of energy that travels in waves. And that explanation works for many phenomena. But it does not work for phenomena such as the photoelectric effect and certain other properties of light. Today, scientists have two different but complementary ways of describing light. In some cases, they say, it behaves like a wave. But in other cases, it behaves like a stream of particles—a stream of photons. Read more: http://www.aplusphysics.com/courses/honors/modern/duality.html http://www.scienceclarified.com/Oi-Ph/Photoelectric-Effect.html#ixzz3MLV49L00 http://www.physlink.com/Education/AskExperts/ae24.cfm http://www.colorado.edu/physics/2000/quantumzone/photoelectric.html
  11. 1 point
    BREAKING NEWS recently three students, Mike Belmont, Zach Haight, and Jake Barnes have found acceleration by gravity ina series of steps including using meter sticks to determine the height from the ball too the ground from the cieling of a classroom. by doing so they measured the time it took for the ball to hit the ground and also measured in metersthe height of the ball off the ground. they determined the acceleration by using a formula to determine distance and used conversions to find the acceleration of 8.98 meters per seconds squared. we can use this to determine acceleration on earth due to gravity. the percent error was 8.48 percent from the actual acceleration of 9.81 meters per second squared.
  12. 1 point
    Article: Breaking News! West Irondequoit physics students have calculated the acceleration due to gravity! In a physics lab students participated in, they used only a stopwatch to find the acceleration due to gravity. They dropped a ball from the ceiling of their classroom and used only the initial velocity, height of ceilings and the time it took for the ball to drop from the ceiling to find the acceleration due to gravity with an equation. When calculating this, they had only 3.98% error from the actual 9.81 m/s2. They got 10.2 m/s2 for the acceleration due to gravity. The students that preformed this lab had a breaking discovery that could change physics forever. By being able to calculate the acceleration due to gravity with only a simple stopwatch, physicists around the world can now do the same. This new strategy makes calculating this acceleration with simple algebra.
  13. 1 point
    Well let's be a follower and blurt out the same information as everyone else... Here we go. My names Corey, I play football and wrestle. I plan on joining the air force and becoming either a pilot or any other cool job I find out about. I am probably the only person taking this class that thoroughly enjoys science. I'm that person who sits at home and watches through the wormhole with Morgan freeman and thinks about the world and how we've come to understand it. I am also taking so bio (why? Because I can...) and I think Mr. Fullerton is super hilarious (true, but hoping he'll read this and I can grab some extra credit or something) and yeah that's a little bit about me. I am taking physics because well I'll say it once again I actually like science a lot. And also I just like knowing more stuff. Knowledge is power (yeah that's a Mr. Tytler quote) and I hope to be able to actually understand the mathematics behind some of the theories that I have heard about that fascinate and boggle my mind.
  14. 1 point
    Hi Kelsey, nice to see you also have an interest in the subject and the material hope we all have fun learning with Mr. Fullerton because as we all know "physics is fun"
  15. 1 point
    My name is Kelsey, I am 16 years old and I'm a senior. My parents are divorced but I have equal time with both of them. I grew up in east Irondequoit until my mother remarried in 2008 and I moved to west Irondequoit. My interests outside of school are dancing. I have been dancing for fourteen years and will continue to hopefully become a dance teacher. I also have two jobs that I manage during the school year, which are being a dance assistant teacher and working at Auntie Anne's. In addition, I am taking regents physics and Mr. Fullerton is my teacher. Junior year I didn't think about taking physics until my counselor, Mr. Mcdonald suggested the course to me. He explained that since I did so well in trigonometry and I'm more of a "hands on" learner, that I would enjoy physics more then Chemistry. I also decided to go with this course because I'm interested in learning about energy, movement, mass, matter and everything that has to do with physics and what makes things move. To conclude, I hope to learn all the elements to physics and succeed.
  16. 1 point
    Hi my name's Kalea (kuh-lay-uh) and I am a senior here at IHS. In my spare time I love to run track and play field hockey. When i'm not in school i'm working, and when i'm not working i'm sleeping. When I'm not sleeping I'm usually buying something online or in person that I really don't need! I am looking forward to my senior year! I took physics because I generally enjoy sciences, and I didn't want to take environmental or AP Bio but I wanted to take a science. Which left this and AP Chem so with the toss of a coin this won! I hope to learn stuff about space and how gravity and other forces affect the human body. I'm hoping to come out the Regents feelings great! video of a skill needed to be successful on the field:
  17. 1 point
    just you wait until Mr. Fullerton reads that you think he's "super rad." you'll never hear the end of it.
  18. 1 point
    Hiya Brenda, and welcome to APlusPhysics. Do you have younger siblings? They could be pseudo-pets... Bonaventure is a great school, and Olean is a fun little town -- tons of great restaurants (The Beef and Barrel is one of my all-time faves!)
  19. 1 point
    Hello Rika, can't wait to enjoy physics together this year woooo!!!
  20. 1 point
    Hello everyone! My Name is Moritz, I am the Austrian Exchange Student. I love sports, I play Rugby for RC Danube in the U18 Pirates Team, but also do lots of other sports like Windsurfing, Mountain-biking (Downhill), Skiing, Snowboarding, Kitesurfing, Sailing and lots of other Sports at any time of the year. In Austria I go to an "Art School" where the main focus is on photographie and art. I take Physics because it is part of my Exchange Programm and I have to, but I anyway think that it is very interesting as Physics is basacally everywhere! My goal for this year is the get a better view of Physics and I would like to do a lot in the lab and learn lot's of new things
  21. 1 point
    Hi, my name is Trevor, I'm a junior at IHS, and I would like to tell you about my busy and interesting life. I have a sister, Cailyn, a mother, Kim, and a father, Mike. I have many interests including, baseball, in which I play and practice for year round, being one of my most favorite hobbies on my life. Also, during the winter, I enjoy participating in Ski Club; however I only ski, not snow board. One my other hobbies are camping, in which I do with my close friends or family during the summer. Overall, you can see that my life outside of school is very packed, but cool. However, I can't forget about why I chose to take Physics this year. I chose Physics because I've heard that this science is different from any other, in that it has a little more math and hands on activities involved, which are my strengths in school. However, I also plan to take AP Physics next year because if I choose not to go into the medical field in the future, I would then want to be in the engineering field. As you can see, I have a packed, but athletic life throughout the year, and I hope it continues to be that way. -Trevor Hess
  22. 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!
  23. 1 point
    I also agree with your second paragraph, but do you remember the nerf wars we had in your backyard in Rogers! Now there's some physics for you.
  24. 1 point
    Peter this was great. Absolutely stunning. I agree with your second paragraph.
  25. 1 point
    My name is Mark. I stumbled on this site while looking at things for the new AP Physics courses. This is my 34th year of teaching and I will have 3 sections of AP 2 and 3 sections of AP 1. I have taught AP B for many years. I am looking forward to having less content and more time for better understanding.
  26. 1 point
    Hi Sungy, The following may help you with putting all the pieces together... http://www.aplusphysics.com/courses/ap-c/videos/APCRotKin/RotKin.html http://www.aplusphysics.com/courses/ap-c/videos/MomentOfInertia/MomentOfInertia.html http://www.aplusphysics.com/courses/ap-c/videos/Torque/Torque.html http://www.aplusphysics.com/courses/ap-c/videos/APC-RotationalDynamics/RotDyn.html
  27. 1 point
    Hello, I got to this question and was not sure how to go about it. I sorta had an idea but that was for the line charge of a fixed length, so do I just ignore the lengths and assume that E= lamda/(4 pi e0) and then use V=int(E*dl)?
  28. 1 point
    Hi, My textbook asks the question: The phase of an Electromagnetic wave at a point P at some instant is 5pi. Which of the following statements about the field vector is true? A)Both the electric and the magnetic field vectors are 0 B)The electric field is 0 and the magnetic field has its maximum magnitude C)The electric field has its maximum magnitude and the magnetic field is 0 D)Both the electric and magnetic field vectors have their max magnitudes. My question for this question is, is the textbook talking about phase difference? If so, how can the magnetic field and the electric field have a phase difference since it is originating from the same source? Thank you to all who take the time to reply to my question!
  29. 1 point
    The Hour of Code is simple. Just go to code.org and click the START button. Yes, it is really that simple. There are quite a few tutorials at several different levels and in several different programing languages. But the real ... View the full article
  30. 1 point
    Hi, I was wondering how a Faraday cage works. Why is that that electric fields exist outside conductors and even on the surface of conductors but the field is always perpendicular to the surface of the conductor? Also, in relation to this topic, a conductor with an excess of negative charge is in electrostatic equilibrium. Describe the field inside the conductor. What does it mean for it to be in electrostatic equilibrium. Is it just that the electrons are on the surface of the conductor? if so, wouldn't the inside of the conductor be charged positive because a lot of the negative charge is no the surface. Thank you so much for those who take the time to answer my question!
  31. 1 point
    You'll do great at ANYTHING you set your mind to, I have no doubt. And thanks so much for your too-kind comments. Made my night, definitely my week, without a doubt the month, and quite possibly my year! Now to go find a tissue, I think a bug just flew into my eye and made it tear up a bit...
  32. 1 point
    If you asked me that question as a fourth grader or even seventh grader I would have said a scientist. I was asking for microscopes for Christmas as age nine, and anatomy books at age 11. And I will admit to playing a few video games. Shockingly, I want to be an English major now. However, physics is the best subject known to man. Especially if you are blessed to be in Mr. Fullerton's class. Best teacher ever.
  33. 1 point
    Baking and soccer are always good interests!
  34. 1 point
    My name is PFowler and i am 17 years old. There is a lot to say about myself and I find that there isn't anything i can't talk about. In school, I am a hard working individual and i strive for success. I prefer to work in groups and to have a hands on enviornment so I can gain more knowledge about things and I find school fun experience. Outside of the classroom, I am many things. During my free time I play soccer and enjoy playing any sport and hanging out with friends. I am currently number 17 on the varsity soccer team and a returning player. One of the biggest things i can say about myself is that i am a proud Eagle Scout of Troop 231. I got my eagle award in the summer of 2012 and it has impacted my life in such a positive way. Problem solving skills, public speaking, and team work are all my strong suits thanks to scouting and it has made me who i am today. i am an all around great person and i have the highest respect for people and look forward to working with my peers in my classes this year. I am talikg physics because it was the next class that was put on my schedule. So far i have found that this class will be one of the more interesting and intriguing classes i will take in my high school career. I hope to learn about anything new and interesting. I don't know what Im looking for yet but i bet i will find something by the end of this class. Though i may have a rough idea for what I want to learn, i am up to the challenge of learning new things.
  35. 1 point
    Nice to have you on the team Mir, and I'm happy we have a class together! Hopefully we can help eachother to succeed in this class this year
  36. 1 point
    Omg Miranda!!! i hope you do good with chearleading
  37. 1 point
    My name is Baillie, I am 16 years old. I have two sisters and a brother. Family is very important to me. I love to be creative and express my self, In a reasonable manner of course. I played soccer since I was 4 years old but I recently have stopped playing school soccer and focused more on working and my grades. I enjoy school, somewhat. I feel as if my grades are pretty good. Grades mean alot to me because my future means alot to me. I don't want to graduate high school, go to college, start a career, get married, have children and so on and so on. I want so much more than that, yes I want to graduate high school as well as college and have a career. But I want to travel all around the world. I am determined to make something of myself more than whats expected. I am taking physics because it was the credit I needed and I thought that it is a science that we don't really get a good enough understanding in while in junior high and other science classes. I also picked this class because I feel like I will be interested in the topics we will learn about. I hope to learn things that are surprise to me, I would rather spend my time taking a class learning about something I've never heard about and try to understand it compared to learning things I have a basic idea on. I'm really excited to gain more knowledge on a science that alot of people don't understand. I also can't wait for the hand on activities of this course.
  38. 1 point
    Time travel was inconceivable for Newton and his studies. But in Einstein's universe it has become a possibility. Science fiction about time travel inspired some of today's scientific ideas on the subject. So dreaming about alternate universes is ok no matter what field you study. Time travel to the future is possible, and it has happened. Like FizziksGuy said, astronauts have aged slightly less than we whose feet have stayed on earth. Now whether time travel to the past is possible, that is still debated, given certain physical conditions. Also, the study of time travel can be used to discover whether the universe could have been created itself. Because of research on time travel, some scientist claim to have a prediction on the span of human existence. Considering how much time we have lived on earth, it is remarkable how much we know about the universe.
  39. 1 point
    Very expensive but it looks good.
  40. 1 point
    I'm sure we will. Most of this team has been taking AP tests for a couple days.
  41. 1 point
    How to calculate specific heat capacity of ice.specific latent heat of vapourisation of water,specific latent heat of fusion of ice, specific heat capacity of water? How will i know you have reply?
  42. 1 point
    Hi Everyone, I'm FizziksGuy (aka Dan Fullerton), and I'm thrilled to be able to welcome you to the APlusPhysics site. Please make yourself at home, get acquainted with our other members, and if you have any questions, feel free to ask away! Thanks, and make it a great day!
  43. 1 point
    Hello, hopefully I am posting in the right area. I apologize if not. I am studying the physics iBook "Physics - fundamentals and problem solving" , which is an absolutely amazing book by the way.. i had no idea one could teach through a book with a few videos and get the same results as a full on physics classroom. But anyway, there is a concept I am having trouble grasping. I understand that the force of the gravitational pull is mass times acceleration of gravity but what I'm having trouble with is what we are measuring when we stand on a scale. I was browsing the net and I got onto the Wikipedia site, http://en.wikipedia.org/wiki/Pound_(mass) , where it says that pounds are units of mass in the imperial system we use here in the US. It also goes on to talk about pound-force and pound-mass and that is where It gets me confused. When I step on a scale, is that scale measuring my mass? or my weight here on earth? Pound force would be weight (mass times gravity) and pound mass would just be mass I suspect?it might be a silly question to most, but I've never heard of this. and coincidentally, if one pound is .45359 kilograms, does that mean 1 pound-mass or pound-force equals .45359 kg? When they step on a scale with kilograms, is it measuring their weight or mass? In weight lifting, or on truck scales in kilograms, is that the mass or the weight? Thanks!
  44. 1 point
    Three amazing students at Irondequoit High School have made a break through in the study of physics: By only using a stopwatch, a measuring tape, and a ball, the acceleration due to gravity has been calculated in a new and scientific way. Students measured the height from the floor of the classroom to the top of the ceiling with a measuring tape, and got 2.75 Meters. Holding the ball at the top of the ceiling, the three students dropped the ball and started the stopwatch at the same time. They measured that the time the ball took to hit the bottom of the floor was .64 seconds. Also, the initial velocity of the ball was 0 m/s because any object dropped starts with an initial velocity of 0. Using this information, the students calculated for the acceleration to see if it really is 9.81 m/s2 . The Formula : d= viT+ (1/2)(a)(t^2) was taken to figure it out. with the information they had, the converted formula became: 2(2.75 m)/ (.64s)^2 = A . The answer obtained was 13.4m/s^2. Obviously it is not the real accepted value of 9.81, so they had to calculate percent error also. using the formula: (accepted value - actual value)/(accepted value) X100, the answer came out to be that there was a 36.6% error in their experiments. Faults in the experiment were being able to time the stop watch precisley, and measuring an accurate distance from where the ball was dropped , to the ground. Overall, the students at Irondequoit High School have created astounding breakthroughs in calculating acceleration due to gravity.
  45. 1 point
    So I finally watched the pilot episodes of the new Fox scifi drama "Terra Nova" (it airs Mondays at 8:00 p.m. ET). I found it watchable, with some potential, and like every other TV show in existence (except "Firefly") it had some things I liked and some I didn’t. I got email about it due [...] More...
  46. 1 point
    Here's a problem I encountered sometime in the first few weeks of mechanics last semester. Post an answer if you get one, or ideas if you have them. I can provide hints as necessary (diagrams, possibly useful tools, etc.) maybe starting later in the week. At this point I am considering turning these around on a weekly basis, and so I'll probably post a solution Monday, 12/6. If Mr. Fullerton wants to give extra credit for such things, I imagine one would want to have it done before then for extra points. And show all work! Whether by beautiful here or by mailing be the back of a napkin, documenting your thinking is imperative. Suppose a hockey puck sits atop a spherical, frictionless surface of radius R. The puck is then given a very small nudge, just so that it begins moving slightly (this nudge imparts a negligible amount of momentum onto the puck). Through what vertical distance does the puck descend before leaving the surface?
  47. 1 point
    If you weren't a super duper physics student, it would seem so! However, Forces cause accelerations on an object. and if an object is not accelerating in any direction, two things can be happening to the object. It can either be motionless OR in constant motion; talk to yourself about the definition of constant velocity, thats how I wrapped my brain around that one. Velocity only changes with acceleration (forces), so a constant velocity means no forces or forces that cancel each other out. I hope this helps!
  48. 1 point
    And sorry to keep adding to this... but upon further investigation - you might want to be in Pascals (does that sound farmilar lol?). That is in N/m^2 so you will need to figure out how many m^2 you have from cm^2. There are 100 cm in a m, so 10,000 cm^2 in a m^2 (100x100=10000). Divide your area given by 10,000 to find how many m^2 you have instead and then plug that number into P=F/A as the A instead of in cm^2 and you will have your answer in pascals.
  49. 1 point
    I'm hoping this is the right place to post for Physics C Problems. I thought I heard that people were confused by the billiards web assign so I thought I'd weigh in. To me it seems like the velocities of the cue ball and the 8-ball have been switched on the webassign, but maybe I'm crazy. Also, I only know from experience that perfectly spherical billiard balls that collide perfectly tangentially ricochet off each other at complimentary angles, but the mathematical explanation in the answer packet leaves a bit to be explained for me. Any clarification would be much appreciated!
  50. 1 point
    I just did the ruler under the newspaper thing Mr. Fullerton showed us in class for my family and it worked! I was so proud of myself

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