Webtools: No Registration Needed for Students Welcome to my list of webtools that don’t require student registration. This started off as a simple curation for myself and has ballooned into something that I never thought would get this big. And it is still growing. I started added comments to each link, but that is taking a long time to complete. Please bear with me as I update it. While I do try to verify each link on a regular basis, please be aware that websites do change and some of these sites may no longer be active or may have switched to a paid version. Free. Over the next while, I will be adding labels to each of these to designate whether you can use this site without any registration at all or will need the use of a class code given by the teacher. If you find a bad link, bad site, or any other error, please let me know through the comment section. Index QR Codes Create Decode online ZXing Decoder Online: Decode QR codes online without a dedicated app. Return to the Index Survey and Polls Online Whiteboards/Corkboards PDF Tools
Computoser Electric Circuits Student Learning Objectives Lessons / Lecture Notes Important Equations Example Problems Applets and Animations Student Learning Objectives To understand how current flows through conductors. To understand and apply a basic model for current, including conservation of current. To introduce resistivity, resistance and Ohm's law. To develop and use a conceptual model of simple DC circuits. Lessons / Lecture Notes The Physics Classroom (conceptual) Electric Current PY106 Notes from Boston University (algebra-based): Introductory physics notes from University of Winnipeg (algebra-based): Current, Resistance, and Circuits HyperPhysics (calculus-based) Electric Circuits PHY2049 notes from Florida Atlantic University (calculus-based): Electric Current and DC Circuits PHY2044 notes from Florida Atlantic University (calculus-based) Electric Current and DC Circuits General Physics II notes from ETSU (calculus-based) Important Equations Example Problems (b) The resistance of a bagel toaster is 12.5 Ω.
Vectors Like many mathematical concepts, vectors can be understood and investigated in different ways. There are at least two ways to look at vectors: Algebraic - Treats a vector as set of scalar values as a single entity with addition, subtraction and scalar multiplication which operate on the whole vector. Geometric - A vector represents a quantity with both magnitude and direction. We can abstract away the differences in these approaches and just look at what is always true of vectors, when we do that we get a set of axioms usually in the form of equations. An example of an axiom for vectors is the 'distributivity law': This axiom is important because it describes the linear property of vectors Geometric Properties A vector is a quantity with both magnitude and direction, there are two operations defined on vectors and these both have a very direct geometric interpretation. Vector addition: to add two vectors we take the start of the second vector and move it to the end of the first vector. so,
Country Codes List - ISO ALPHA-2, ISO ALPHA-3 and Numerical Country Codes The ISO country code are internationally recognized codes that designates for each country and most of the dependent areas a two letter combination or a three letter combination, its like an acronym, that stands for a country. This code is used for example for the two-letter suffixes such as .us (United States), .fr (France) or .de (Germany) in top-level domains (for countries) in the Internet. The three letter code is also often used at events with international participants from various countries like sports meetings or song contests, where you can see abbreviations like CAN (for Canada), DNK (for Denmark), AUS (for Australia). This is a list of two letter codes (ISO alpha-2) and the three letter codes (ISO alpha-3) as well as the United Nations used numerical code M49 for countries, dependencies, and other areas. (To sort the data click on the respective header of a column (to sort multiple columns hold down the shift key while selecting the columns to sort ).
Morse Code Translator Text to Morse Just type letters, numbers and punctuation into the top box and the Morse code will appear in the bottom box with a "#" if the character cannot be translated. If you want to translate prosigns, enter them as for instance and tick the "Use prosigns" checkbox in the advanced controls. This is not a great tool for learning Morse code as looking at the dots and dashes does not help. Instead, try the CWOps Morse Trainer. Morse to Text You can type Morse code into the top box using "." for a dot and "-" or "_" for a dash. Sound, Light & Vibration The "play", "pause", "stop" and "loop" buttons control the playback. Notes To produce the sounds, in recent versions of Chrome, Firefox, Safari and Edge the translator uses the Web Audio API and requires Javascript to be enabled. If you would like to see a list of all the Morse code characters please go to my Morse Code page. Change log 2019-09-39: flashing light bug fixed.2019-08-26: translation appears as you type!
Directory listing for ia800500.us.archive.org Word Cloud Generator How the Word Cloud Generator Works The layout algorithm for positioning words without overlap is available on GitHub under an open source license as d3-cloud. Note that this is the only the layout algorithm and any code for converting text into words and rendering the final output requires additional development. As word placement can be quite slow for more than a few hundred words, the layout algorithm can be run asynchronously, with a configurable time step size.
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