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  1. View File The Ultimate Regents Physics Question and Answer Book - 2016 ed. This study book contains nearly 1500 questions and answers from the last 20 Regents Physics exams through June 2015 broken up by topic. A terrific companion book to go with APlusPhysics: Your Guide to Regents Physics Essentials. Topics covered include: kinematics dynamics circular motion gravity momentum work and energy electrostatics circuits magnetism waves optics modern physics Problems are presented in workbook / worksheet format. This is a license for a digital download of the PDF version for use by one person only on up to five electronic devices. This document may not be printed, edited, re-distributed, re-sold, or licensed to any other user. Once the file has been downloaded no refunds will be given. Just to reaffirm -- this file is NOT printable. Submitter FizziksGuy Submitted 05/03/2013 Category Books  
  2. Hey Mr. Fullerton and anyone whos reading this, its been a pleasure grinding this year. Hope you enjoy this great video and maybe even chuckle a bit.
  3. Version v1.08

    This study book contains nearly 1500 questions and answers from the last 20 Regents Physics exams through June 2015 broken up by topic. A terrific companion book to go with APlusPhysics: Your Guide to Regents Physics Essentials. Topics covered include: kinematics dynamics circular motion gravity momentum work and energy electrostatics circuits magnetism waves optics modern physics Problems are presented in workbook / worksheet format. This is a license for a digital download of the PDF version for use by one person only on up to five electronic devices. This document may not be printed, edited, re-distributed, re-sold, or licensed to any other user. Once the file has been downloaded no refunds will be given. Just to reaffirm -- this file is NOT printable.
  4. Version 2nd Edition

    AP* Physics 1 Essentials is an easy-to-read guide to the entire AP Physics 1 course, featuring more than 600 worked-out problems with full solutions and deeper understanding questions. AP Physics 1 Essentials covers all major topics included in the AP Physics 1 course, including: kinematics, dynamics, momentum, impulse, gravity, uniform circular motion, rotation, work, energy, power, mechanical waves, sound, electrostatics, and circuits. AP Physics 1 Essentials is integrated with the APlusPhysics.com website, which includes online question and answer forums, videos, animations, and supplemental problems to help you master the essential concepts of physics. This book is designed to assist physics students in their high school AP Physics courses both as a guide throughout the course as well as a review book to assist in end-of-course exam preparation. Its focus is on providing the bare bones, essential concepts necessary for success in the course in a straightforward and easy-to-read manner, leaving development of in-depth problem solving and lab work to the classroom, where it is most effective. In short, this is not intended as a substitute for a standard textbook or course, but rather as an invaluable supplementary resource. New 2nd edition includes more than 90 AP-style problems to test your understanding and help prepare you for the AP Physics 1 Exam. Additional supplemental AP-1 level problems are available on the APlusPhysics site. Note: This is a license for a digital download of the PDF version for use by one person only on up to five electronic devices. This document may not be printed, edited, re-distributed, re-sold, or licensed to any other user. Once the file has been downloaded no refunds will be given. *AP and Advanced Placement Program are registered trademarks of the College Board, which does not sponsor or endorse this product.
  5. I've been interested in engineering for years, and have wanted to go to R.I.T as long as I can remember. I'm not exactly sure what I want to do yet, but I know I'd like to go Into some field of engineering, and have an interview for an internship at optimax, so if I end up getting it, hopefully it will help me figure out what I do (or don't) want to do. I guess the reason I decided to take physics again this year is because I just really hate myself. But seriously, I really enjoyed physics last year, even though it was pretty challenging, I learned a lot of cool stuff, and I wanted to learn more about physics and the way things work. I also would like to go into some field of engineering in the future, and figured some background in physics might be helpful. I hope to get some good experience in physics, even if I do not get college credit at the end of the year (even though there's a good chance I will), it will at least give me some prior knowledge to use in college. This year I'm most excited to hopefully build catapults if that's still happening. I'm most anxious about all of the out of class work as it can be easy to put it off in favor of other class work then be screwed the day everything is used.
  6. I'm sure everyone reading this knows what a sniper rifle is. You know: long barrel, cylindrical scope, big long bullets, used for long range and heavily armored targets. But, what you might not know is how powerful one is. The standard NATO sniper rifle bullet is the .5 BMG. Made in 1921, the most powerful version of that cartridge is about .052 kg, and leaves the rifle at 882 m/s. p = mv, so p = (.052)(882) = 45.86 Ns. That big fat hunk of copper has about 50 Ns of life in it. Now, the average adult human head weighs about 4.5 - 5 kg. Seen as how I'm writing this I'll use myself as the test subject. I'm not quite an adult yet, so let's say 4.5 kg. One day, a friendly physics teacher near you sees just way too many tests in one day, pulls a standard issue sniper rifle out of his attack and takes a pot shot at some weird kid. Naturally my head pops of like a tootsie pop in that owl cartoon. Assuming the bullet finds a warm new home in my cranium, that's 10.08 m/s it pulls my dome along with. The average height of a 17 year old male teenager is about 1.75 m. Assuming that the bullet is fired horizontally, we can use kinematics magic to find that my head hits the ground 6.02 m away from my toothpick body, and rolls whocares m afterwards. Doesn't sound fun does it? That's why I'm proud to present to you our newest innovation in protective headgear: the tank hat. This simple helmet is made of solid 6" steel and can protect you from bullets, mortar, bullies, and apples. Teach Newton a thing or two today! --Warning, tank hat does not protect against .5 BMG Armor Piercing rounds. Don't be rude to IHS Physics teachers for your own good--
  7. Name: Introduction to Equilibrium Category: Dynamics Date Added: 2015-07-30 Submitter: Flipping Physics Learn about and see examples of Translational Equilibrium. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:11 What happens to an object in equilibrium? 0:40 Using Newton’s 2nd law to describe what happens… 2:16 Example: Book at rest on an incline 2:45 Example: Car moving at a constant velocity 3:18 Translational equilibrium Multilingual? Please help translate Flipping Physics videos! Next Video: 5 Steps to Solve any Free Body Diagram Problem Previous Video: Understanding the Force of Tension 1¢/minute Introduction to Equilibrium
  8. Throughout the fall and winter seasons, I watch a lot of football games. I think physics is applied to football in many ways like, when the football is thrown, acceleration of players from rest to when the play is going on, and also in kicks which have similar characteristics to throws. Kicks and throws both have the football moving in a parabolic path to its target with an initial velocity and with gravity forcing the ball back down to the ground. The players themselves constantly go from rest at the beginning of a play, accelerating, and then usually get hit by a player of the opposing team. Although, we haven't learned this part yet, I know that with a collision of objects there will be a force that is not gravity acting on an object, in this case a football player. I'm interested to see how we will work to solve these kinds of problems, and if there are any new formulas to learn.
  9. An activity I perform where physics is applied is martial arts. I think physics applies to martial arts because all the movements are meant to be efficient and quick based on how your body can perform those moves. the goal is to always find the most effective way of completing movements which requires knowledge of some physics. (Distance from target, speed, power, etc.) I am taking physics this year because i thought it would be the most interesting science class that I could take in high school. I also am not a big fan of other science classes like biology or chemistry, so physics was the best choice. I 'm most excited this year for the catapault unit because I like hands-on projects and it seems like it could be a fun unit. I'm most anxious for the midterm and final, and I think it's obvious why.
  10. Name: The Feynman Lectures on Physics Category: Other Date Added: 01 September 2014 - 09:50 PM Submitter: Volume I mainly mechanics, radiation and heat Volume II mainly electromagnetism and matter Volume III quantum mechanics View Video
  11. I need help with these questions please.
  12. This March, the F-35 Lightning II made its first public demonstration at an air show. The U.S. Military is expected to purchase over a thousand of the new jets in total, eventually being put in service with the Navy, Air Force, and Marine Corps. The Air Force version, the F-35A, will be the lightest and most agile. The thrust to weight ratio is over one, meaning that the engine produces more thrust (191 kN!) than the weight of the aircraft. In other words, it is able to speed up while flying 90 degrees to the ground...straight up. The Marine Corps version, the F-35B, is the most powerful, in that it has a specialized engine. The thrust can be vectored down to "push" the aircraft off the ground, therefore allowing the aircraft to take off in ridiculously short distances (perfect for the Marines' shortened aircraft carriers) Lastly, the Naval version, the F-35C, has a larger wing area and strengthened landing gear for landing on an aircraft carrier. The wing area is increased simply because this version will have to fly very slow on final, meaning more lift is needed to keep the aircraft from entering an aerodynamic stall. The increased wing area provides more lifting surface area, so (by Bernoulli's principle), more air will flow over the airfoil, inducing a greater low pressure area over the wing. More lift is then created, allowing this model to control itself as very low airspeeds.
  13. Hotdog was right when she said that physics was completely nuts on the first day of physics. Physics can become overwhelming at anytime during your learning career in less than two seconds. Physics is a fine art and is shaped in many different ways. The cool thing about Physics is that it's used for practically everything; this is why physics is necessary for life! The first thing I would like to talk about are the VIR Tables. I really like VIR tables because once you get the hang of it you can calculate how much energy is running through your entire house. Another thing that is pretty interesting is that there are three different kinds of circuits, series, parallel, and mixed. All that can really help you get through this course is paying attention and asking questions. It also might help if you ask your teacher for more problems for practice. This shows dedication which is key in learning! Happy Studying!
  14. I use to think physics was easy after watching the movie Ice Princess. But boy what I wrong! At least at first anyway. It took me awhile to understand physics because it is literally everything! Physics explains everything from why a balloon sticks to a chalkboard after you rub it in your hair, to why everything doesn't fall when you pull a table cloth from underneath it. Now that I understand that physics can do such cool things, I kind of like it! At the beginning of this chapter I thought I was going to die. I found it so hard and confusing, but now I understand it. It just took me awhile to understand the VIR charts and the circuit rules, but now that I get it, I feel confident about tomorrow's test! Go physics!
  15. On March 1, 2014, user Ben Shelton discussed how physics is used in the James Bond movie Skyfall. Since I have seen this movie and other action movies like it, I found it interesting how heroes such as James Bond defy the laws of physics. Ben Shelton broke down the first scene of Skyfall using the equation vf2 = vi2 + 2ad to prove the inaccuracy of a character's fall. It makes me wonder how physics could be used to analyze other action movies. Here is the link to the original post (warning: it contains spoilers):
  16. In response to hotdog's post of March 17th: I know exactly how you feel hotdog. My first day in Honors Physics was perhaps the most stressful hour and a half of my life, but I knew I couldn't give up on the first day. I think the reason physics is so scary is because it's different from anything else. The things I learn in physics are so far removed from any of my past or current classes it can be very intimidating. Yes, you use the same math operations you used in Algebra, but the concepts are very different from other classes. This is also the reason physics is cool. If you understand it, you understand so much about the world. You can calculate or figure out just about anything you see in everyday life. Sometimes (actually, all the time) learning physics makes my brain ache, but it's worth it. I've been in honors physics for about nine weeks and I figured out how to do well in the class...don't freak out. When you don't understand something, all you have to do is ask your teacher or look at other resources (like your text book or youtube.) Its usually not as hard as I initially think it is and when I take a deep breath and focus, I can understand it, and earn an A! Another thing that helps is to keep an open mind, think outside of the box. Physics, like I said before, is sometimes different from other classes so it might not look familiar. Don't let this scare you though, because with the right attitude and mindset, everyone can succeed in physics class!
  17. Since grade school I have been taught that math is in everything you do. Since the beginning of this semester of taking physics, I have learned that physics is involved in every single thing. When my class learned kinematics, my thought process of things change. Now when I see an object fall or thrown I think of the math that goes into its free fall or its projectile motion. When I'm driving I also think about my velocity and acceleration in my car. Since learning physics, it has taught me a lot and has also changed my perspective on the world.
  18. moon77 on 3 16 14 referenced a video on how James Bond defies the laws of physics. This was a very interesting post and made me think about movies in a way that I never had before. It truly reinforces the assertion that physics is in everything. I loved how the user broke down his calculations to show his readers exactly how James Bond defies the laws of physics.
  19. Below the atmosphere, we have a little problem called global warming, or just in general high levels of pollution for you non-believers, which is the general degradation of our atmosphere and lakes and oceans due to excessive amounts of waste, brought on by agregious practices and poor waste management. In space, there's Kessler syndrome, the hypothetical scenario where, when the amount of space debris orbiting our planet becomes over-saturated, various "leftovers" from spacecraft will collide and split apart, going on to hit even more debris creating a cascade of small but dangerous shrapnel that will make travelling through low-earth orbit an unfeasible, and at the very least highly difficult, affair. Just like below our atmosphere's limits, we need to be concerned about pollution. While space pollution has a much smaller influence (space is big, and the chances of hitting something are slim), it is still dangerous and costly, but much of the time preventing this pollution is difficult, as it requires a lot of energy to bring a empty fuel tank or decoupler back down into the atmosphere. But, for the moment, it isn't too serious, so in case any of you were actually planning a mission into the grasps of space, don't get anxious.
  20. It's common knowledge that a blue flame is hotter than a red/orange frame. While I'm not entirely sure that is true, having never tested the fact with my own appendages, many reliable sources seem to say it's true. But why, really, is a blue flame hotter? The answer lies with a bit of science on the nature of "light". Light with higher frequencies (towards the blue/violet end of the spectrum) contains more energy than light towards the other end of the spectrum, the red/orange end (light in this case refers to all electromagnetic radiation - from gamma to radio waves). And when objects are heated, they radiate energy in the form of light. As you can see in the attached image, this pattern of radiation follows a predictable function dependent upon temperature and wavelength. While certain materials emit certain wavelengths better than others, the general trend is that, the hotter the object the is, the more power it will output at higher and higher frequencies. In other words, a blue flame is emitting more energy at higher frequencies because it is hotter. Theoretically, purple flames would be even hotter, and would most certainly look cooler. The big lesson is that there are plenty of ways to quench your curiosity about flammable objects with your eyes, and not your various limbs. Although I guess you can always try.
  21. 'Twas only yesterday that I took my inaugural ski run, traversing the trails of Bristol, and as I cruised down the mountain I began to reflect on the nature of skiing, particularly waxing. My skis weren't particularly well waxed for the day, so I wasn't going quite to fast, but I did have experience waxing skis beforehand (mostly with nordic skiing - for that it was a weekly affair). When one considers the purpose of wax, it's natural to assume that all it does is make the ski smoother, filling in the tiny holes of the ski so that there is less (dry) friction involved. However, while that is part of what makes a certain type of wax good, a bigger influence is the creation of a thin layer of water underneath the skis caused by contact with the snow. This thin liquid layer allows an even lower coefficient of friction to be achieved, and has to be taken into consideration when waxing your skis (or snowboard). Ideally, only a very thin layer of water is created, because too much will create suction due to the fluid nature of the water, while too little will mean there is still too much dry friction. So the relative propensity of the snow to turn into water on contact has to be taken into account in order to create this balance, and this relative propensity is determined largely by temperature, which is why different conditions require different waxes. Colder temperatures make it harder to create a liquid layer, meaning a stiffer, harder wax is needed, because a harder wax will melt more of the contact layer. On the other hand, warmer temperatures work best with a softer wax. For competitive racers, this means that wax is often reapplied before every race in order to get the optimal conditions. However, for the less enthusiastic, a mid-range wax will often work fine. In case you're every feeling slow on the slopes, take this waxing knowledge into consideration. Soon you'll be zipping around like no one's business.
  22. The second-largest moon in our solar system, Titan, orbits around Saturn, about 8.5 AU (the distance from Earth to the Sun) away from us, making it a very chilly place. A fairly massive moon (80% more massive than our moon, according to Wikipedia), it has the unique characteristic of having an atmosphere that obscured views of the surface until the launch of the Cassini-Huygens mission in 2004, designed to chart out primarily the Saturn system. A moon with an atmosphere is strange, and interesting. But what makes Titan truly intriguing is the presence of a liquid cycle, akin to our water cycle, in it's atmosphere and on it's surface. An average temperature of -179.5 degrees Celsius means that this liquid isn't water - it's methane. The atmosphere and oceans of Titan are composed of liquid methane, which, under the conditions on the surface, acts similarly to water. It evaporates, precipitates, and forms liquid bodies and oceans, just like on Earth. Deeper down below the surface, there is, in fact, liquid water too, at higher temperatures and pressures beneath an icy "crust". Titan is a strange planet, but interesting in it's composition. With a thicker, denser, and "taller" atmosphere than our own, it has some unique properties, and manages to be Earth-like in strange ways, by substituting life-giving water with a whole lot of poisonous (to us) hydrocarbons. But it is interesting nonetheless.
  23. Water is strange. Unlike most compounds, its solid form is (normally) less dense, and of a larger volume than its liquid form. Because of this, its very difficult to compress water, because normally there isn't really anything to compress it into. But the story of ice is a bit different from the snow and hail we see falling outside of our windows during these winter months. In fact, ice has many different forms, depending on the conditions it forms in. The ice we commonly know is called Ih - a common ice type with a hexagonal structure. But as you can see from the picture, there are many different types of ice. Ic is also a (relatively speaking) common ice type, with a cubic structure that can be present in the upper atmosphere. In total there are 15 different types of ice, all forming at different pressures and temperatures, all with different crystal structures, densities, and electrical properties. For example, while water is hard to compress, when put under great enough pressure at normal temperatures, can form into ice IV (not pictured), a denser form of ice. While most variations are just density and structure based, certain forms (like ice XI) have ferroelectric properties, which is something I looked up and failed to understand, but it sounded interesting. And noticing the lower pressures, below ~1 kPa (about 1/100 of normal sea pressure), liquid water fails to exist, and water vapour will undergo deposition straight into ice below this point. As we head into winter, it's interesting to note the complexities of such a common substance. It can take on many forms with many properties, and I think that's pretty cool.
  24. I'm a big fan of sound. Music for me is a nice blend of science and art, and I take strides to better my understanding of it occasionally. And occasionally, I enjoy listening to chiptune songs - 8-bit music, as you may call it. A typical sound wave is sinusoidal, meaning it looks like a sine/cosine curve. This is the natural state of a pressure fluctuation that is sound. However, sound waves are (obviously) not all sine waves. Because of the constructive/destructive interference of waves, waves with a new shape - or timbre - like with a square or saw wave, essentially keeping the dominant frequency (pitch) of the note while still changing how it sounds. What is really happening when this is going on is that, in some ways, the frequency is changing, but just not the dominant frequency. In music, an octave occurs when one note has double the frequency of another, and by changing the amount of sound energy contained in a certain frequency that is an integer multiple of the base frequency (be it an octave or a different multiple), you can change the timbre without distorting pitch. This is the fundemental basis lying behind the Fourier transform, a method for breaking down a period function into an (often infinite) sum of sine waves with different frequencies. With bar-based music visualizers, the same things is happening, with wave shapes being analyzed for the frequencies they contain. But this phenomenom is what makes music sound the way it does, and it demonstrates that wave interference can have some interesting and melodic effects.
  25. A lot of games let you fly planes, but when was the last time one let you fly a rocket? While if that has been what you've been looking for in your time-wasting pursuits, wait no longer, for Kerbal Space Program lets you do just that. As the director/god of the aptly named Kerbal Space Program, you have the ability to launch probes, satellites, landers, space planes, and a whole plethora of fancy little stuff. But behind all of this glamour comes (simplified) rocket science. Much like real rocket scientists, you have to design a craft with fuel and power constraints in mind. Going to the Mun may not be as trivial a task as some may hope. If you prefer fast paced action, this game probably isn't for you. But if you're willing to think a bit, ponder questions about choosing an engine with a larger thrust to weight ratio versus one with a higher specific impulse, or how you should stage your creation to successfully land on Minmus and return home safely, this might just be your cup of tea. I recommend checking it out.
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