Regents Physics Introduction So, you’ve decided to take on the challenge of learning physics… a noble pursuit, no doubt, but what have you gotten yourself into? What do you hope to accomplish with this newfound knowledge? Where ever will you use what you learn? Why go to all this trouble? Those are some pretty deep questions, which hopefully you’ve started to think about if you haven’t previously. The answers, though personal, may be helped by first answering the question, “What is Physics?” Physics is many things to many different people. Physics, in many ways, is the answer to the favorite question of most 2-year-olds: “Why.” Matter If physics is the study of matter, then we probably ought to define matter. Energy If it’s not matter, what’s left? Mass – Energy Equivalence Our definition of physics so far boils down to the study of matter, energy, and their interactions. Answering the Question Physics, in some sense, can therefore by defined as the study of just about everything.
Fundamentals of Physics I About the Course This course provides a thorough introduction to the principles and methods of physics for students who have good preparation in physics and mathematics. Emphasis is placed on problem solving and quantitative reasoning. This course covers Newtonian mechanics, special relativity, gravitation, thermodynamics, and waves. View class sessions » Course Structure This Yale College course, taught on campus twice per week for 75 minutes, was recorded for Open Yale Courses in Fall 2006. The Open Yale Courses Book Series For more information about Professor Shankar's book based on the lectures from this course, Fundamentals of Physics: Mechanics, Relativity, and Thermodynamics, click here. Course Materials Download all course pages [zip - 10MB] Video and audio elements from this course are also available on: About Professor Ramamurti Shankar Ramamurti Shankar is John Randolph Huffman Professor of Physics at Yale. Syllabus Professor Ramamurti Shankar, John Randolph Huffman Professor of Physics
Why Nikola Tesla was the greatest geek who ever lived Additional notes from the author: If you want to learn more about Tesla, I highly recommend reading Tesla: Man Out of Time Also, this Badass of the week by Ben Thompson is what originally inspired me to write a comic about Tesla. Ben's also got a book out which is packed full of awesome. There's an old movie from the 80s on Netflix Instant Queue right now about Tesla: The Secret of Nikola Tesla.
Viren's Videos Free AP Physics Review Help HyperPhysics Concepts About HyperPhysics Rationale for Development HyperPhysics is an exploration environment for concepts in physics which employs concept maps and other linking strategies to facilitate smooth navigation. For the most part, it is laid out in small segments or "cards", true to its original development in HyperCard. Part of the intent for this exploration environment is to provide many opportunities for numerical exploration in the form of active formuli and standard problems implemented in Javascript. New content for HyperPhysics will be posted as it is developed. A resource that was initiated as a resource for local high school physics teachers whom I had taught has expanded into an intensively used website worldwide. CD or DVD versions have been sent to 86 countries to date, and translations into German, Italian, Chinese, and Español have been licensed and are underway. Please respect the Copyright HyperPhysics (©C.R. Availability on DVD or CD HyperPhysics
Topic 12: Electromagnetic Induction Induced EMF: Faraday and Lenz's Laws Induced EMF is the phenomenon of generating electricity from movement in a magnetic field. Task: Use the apparatus set up for you to make as many observations as you can. Conclusion: When a conductor moves with respect to a magnetic field (or visa versa) an electric current is induced. We need to think of magnetic field lines as magnetic flux (flux meaning something that flows). When a conducting wire 'cuts' across the magnetic flux an induced current is produced.It doesn't matter whether it is the wire or the magnetic field that moves the result is the same. Obviously then wires moving in opposite directions produce opposite induced currents and similarly for magnetic fields moving in opposite directions. Factors affecting the induced current: Magnetic field strength (the magnetic flux density). These factors inform many modern designs- motors, generators and dynamos all have many turns of wire inside them. Faraday's Law F = B I l WD = F x, so... WD = B I l x
ePhysics: The Physics Site Conservation of Charge - Electric Charge - Physics Video by Brightstorm Alright. Let's talk about electric charge and charge conservation. Now this is a really really really old idea. Now later on people realized that glass would do the same thing if you... first rubbed it with silk. If I touch both of them with amber that's been electrofied or with glass that's been electrofied, doesn't matter, then they will repel each other like this. Well, in this case, they come together. Alright. Alright. Second problem. And that's electric charge, charge conservation. more
W.W.Norton & Company | Physics for Engineers and Scientists 3rd Edition Physics for Engineers and Scientists 3rd Edition Online Concept Tutorials These 45 tutorials feature interactive animations that reinforce conceptual understanding and develop students’ quantitative skills. Section Menu Organize Learn Connect Physics in the News Instructors now have an easy way to collect students’ online quizzes with the Norton Gradebook without flooding their inboxes with e-mails. Students can track their online quiz scores by setting up their own Student Gradebook. Alternating Current - IB Physics Stuff 11.3.1 Describe the e.m.f. induced in a coil rotating within a uniform magnetic field. 11.3.2 Explain the operation of a basic alternating current (ac) generator. In both cases above the voltage is not constant, the voltage is dependent on the angle of the coil. Remember that the e.m.f. induced on a conductor in a magnetic field is: If the arm is driven by outside force then a current will be generated and the mechanical energy is converted to electrical energy. An AC power supply in an circuit diagram is given the symbol: This can represent a generator or any other AC power source. 11.3.3 Define the concepts of root mean square voltage and root mean square current. The voltage and current in an AC circuit vary from positive to equally negative values, so what is the voltage and current. Power is defined as: The average power can be defined as: Where and are the peak or maximum values of the voltage and current, respectively. These equations are in your IB formula book. So how does it work?
The Theory of Relativity, For Kids - Trending Sideways So you want to understand the theory of relativity, and you’re a kid? No problem. Let’s get started. (If you’re a parent looking for some activities to help teach your kid, consider ordering Albert Einstein and Relativity for Kids: His Life and Ideas with 21 Activities and Thought Experiments. Light Always Moves the Same Speed A long time ago, scientists wanted to figure out how fast the earth was moving through space. Think about it like this. And, of course, if you turned around and ran toward the rain, it would hit you even harder than if you stood still. Back then, scientists thought that light acted like rain drops in a rain storm. And that’s exactly what they did. The speed of light was the same no matter what. This was very weird. The scientists had discovered that light didn’t act like raindrops or anything else in the universe. Time Slows Down Imagine what would happen if time slowed down for you. So now let’s imagine you’re in that rainstorm again. Fast Things Get Shorter
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12.2 Alternating Current 12.2.1 Describe the emf induced in a coil rotating within a uniform magnetic field. As the handle is turned, AB moves up through the field. As it cuts the field a current will be induced. A coil of wire rotates in the magnetic field due to an external force. Sides AB + CD will experience a force opposing the motion. The work done rotating the coil generates electrical energy. 12.2.3 Describe the effect on the induced emf of changing the generator frequency.If the speed of rotation is changed it will affect:* Time period (distance between peaks)* EMF (amplitude of peaks)For example, if the speed is doubled therefore, the time period will be halved and the EMF (amplitude) will be doubled. 12.2.4 Discuss what is meant by the root mean squared (rms) value of an alternating current or voltage. When the output of an a.c. generator is connected to a resistor, an alternating current will flow. The rms value is the squareroot of this... w= 2π x 50 = 100π rad s-1 BANw= Emax iii) Calculating the rms emf
Physics for Kids: Theory of Relativity Science >> Physics for Kids The theory of relativity is a very complex and difficult subject to understand. We will just discuss the very basics of the theory here. The theory of relativity is actually two theories that Albert Einstein came up with in the early 1900s. One is called "special" relativity and the other is called "general" relativity. You can learn more about two very important aspects of the theory of relativity on this page about the speed of light and time dilation. Special Relativity There are two main ideas that make up Einstein's theory of special relativity. 1. 2. What does "relative" mean? The first principal listed above is pretty confusing. A Relative Example One example of relativity is to imagine two people on a train playing ping-pong. Now imagine someone standing beside the railroad tracks watching the ping-pong game. The result is that the speed of the ball depends on the "relative" position of the observer. E = mc2 Length Contraction Science >> Physics for Kids