Waves Interactive

Collapse of the wave function is a common quantum physics term that stems from the famous double-slit experiment popularized by physicist Richard Feynman. Space Based Astronomy A NASA educator guide which includes several activities designed to help students learn about the electromagnetic spectrum. The simulation displays the superposition of the two waves as well as a phasor diagram that shows how the waves add up at one point in space. The double-slit experiment demonstrates that matter and energy can display characteristics of both waves and particles. All standing waves have places, called nodes, where there is no wave motion, and antinodes, where the wave is largest. Nu Wave Interactive is a multi disciplinary web and graphic design agency that provides professional, innovative design solutions for all areas of interactive media. This is how many noise-cancellation devices work. University of British Columbia. When traveling through a vacuum, the speed of light is equal to 186,282 miles, or almost 300,000 kilometers, per second. Focusing on performance applications we create positive emotions that promote and sell brands across the globe. Answer using complete sentences in your notebook. Local Digital Marketing for Small Businesses | Hibu. Latest Tsunami Event Messages. Floyd Street Louisville, KY 40203 (502) 585-2201. All wave types are designed to propagate in the X direction (illustrated in Figure 1) and parallel to the Earth's surface. For each time period above, the distribution of summer temperatures forms what is known as a bell curve because most measurements fall near the average, forming the bump – or bell – in the middle. Physics Classroom: Sound Waves and Music This section of the Physics Classroom contains a tutorial on sound which consists of 5 lessons with 19 sublessons. The National Data Buoy Center's home page. Seismic waves are usually generated by movements of the Earth's tectonic plates but may also be caused by explosions, volcanoes and landslides. It is labeled I-II-III-IV-V with an extended third wave, a flat correction in wave II and a sharp zig-zag. Relying on a procedural wave model, the method restricts computations to the visible part of the ocean surface, adapts the geometric resolution to the viewing distance and only considers the visible waves wavelengths. Larger amplitudes create louder sounds. (WVE) Interactive Stock Chart analysis - view dynamic stock charting for WAVE Life Sciences Ltd. This site uses high speed video and animations to help explain waves and acoustics. Other waves, known as mechanical waves, can only travel through a medium such as a solid, liquid, or gas. (Note: This grade band endpoint was moved from K–2. The farther away you get, the longer the waves take to travel there—and the older the music you’ll hear. Notes: Can I show static waves? Yes, by setting speed to zero by dragging the sliders all the way to the left. Often at the crest of the waves, saturation is reached and a cloud forms. Sine, Cosine and Tangent in a Circle or on a Graph. The data are collected from NDBC moored buoys and from C-MAN (Coastal-Marine Automated Network) stations located on piers, offshore towers, lighthouses, and beaches. Answer using complete sentences in your notebook. Wave Motion Demonstrations. The emphasis here is on the properties of waves which are difficult to illustrate in a static textbook figure. PCCL | jean pierre fournat. Transverse wave: A wave that causes the particles of the surrounding medium to vibrate in a direction at right angles to the direction of the wave motion. student in the Graduate Program in Acoustics at Penn State. VisPy is a Python library for interactive scientific visualization that is designed to be Simulation of a spiral galaxy using the density wave theory. The software is designed for time domain acoustic and ultrasound simulations in complex and tissue-realistic media. "1stWave provides outstanding architecture and UI expertise in addition to great design. You can change the width and height of the embedded simulation by changing the "width" and "height" attributes in the HTML. The initial signal above is a 200Hz sine wave, which has an amplitude of 5 volts. There is a small hot spot in the top-left corner. Virgin Islands; Latest message for Hawaii, all U. interests in the Pacific outside the West Coast/Alaska Tsunami Warning Center area of responsibility, most countries in the Pacific and around its rim. And, if you visit the How Things Fly gallery in Washington, D. 1 Sinusoidal Waveforms 1. The second video makes the point that sound waves are longitudinal waves but were usually depicted as transverse waves. This differs from sound waves because they have to pass through a liquid, a solid or a gas. Learn how GE innovation builds, powers, moves & cures the world. This interactive lab allows you to hear and experiment with the beat frequency created by the interference of two waves. As amplitude increases, intensity also increases. At present, he is professor of geophysics emeritus at Scripps Institution of Oceanography in La Jolla, California. Summers Are Getting Hotter. Frank Potter's Science Gems Physical Science I FYI: Check back weekly, for we will continue to add new resources to the more than 17000 Web resources that we have located so far. Pure Sine Wave Output. is an execution-only dealer and does not provide investment advice or recommendations regarding the purchase or sale of any securities or derivatives. OSCILLOSCOPE & SOUNDS - Simulation | Interactive flash animation to display the form of an audio signal. Date: 11/13/2019 Time: 1:00 p. This is a collection of interactive tutorials on the fundamentals of waves. Shoot the Stars. An interactive demo which enables you to both see and hear the result of adding two sine waves of different frequencies. angular distance around Earth's surface from the source to. PhET - Physics Education Technology 65 fun and interactive physics simulations available for free download, illustrating everything from quantum tunneling to projectile motion. GFE is a free online function graphing tool that allows you to plot up to three functions on the same set of axes. Link Interactive’s selection includes some of the best smart home security we’ve seen, but you’ll have to opt for the Gold or Elite plans to get a wider selection of smart devices. Question of the Day is a method used by Dr. These are very nice, even if you don't read Italian. Besure%to%label%thecrest,trough. The frequency of this wave can be adjusted by using the "Input Wave Frequency" slider. It is a work in progress, and likely always will be. This interactive notebook uses cut and stick activities to help your class learn about sound and waves. The WAVE Interactive digital signage solution allows an "attract screen" to seamlessly auto loop while allowing additional content to be triggered with a hand wave motion across an designated area, counter or display. Scroll and zoom the map by using the controls at the top. Something Old, Something New, Something Borrowed and Something Brown. Sound Waves Online provides all the digital resources you and your students need to implement the Sound Waves program. Students color the letters on the front, then take notes in the same color below. For transverse waves, the crest is the highest point, whereas the trough is the lowest. the sound waves produced by different musical instruments. You’ll still be able to read existing waves and access the Google Wave client. This page will present you with a variety of questions demonstrating the application of the de Broglie relationship. You can directly control the amplitude (A), phase (phi), and the angular frequency (k). Doppler Shift Demonstrator. Contribute to DeekyJay/SoundwaveInteractive development by creating an account on GitHub. This four minute video reviews the types of waves that are used in mobile, cell phones. Chromoscope lets you explore our Galaxy (the Milky Way) and the distant Universe in a range of wavelengths from gamma-rays to the longest radio waves. a major or minor third above the root). The amplitude is the height of the wave from equilibrium. They can undergo refraction, reflection, interference and diffraction. Interactive Section - Sound Waves Teacher's Lesson Plan Topic Introduction with Key Words Mexican Wave (with explanation text) Transverse & Longitude with a Slinky Spring Wave Speed (Sea Waves, Sound Waves and Radio Waves) Frequency (with example experiment) Wavelength Longitudinal Transverse. Z-Wave is the smarter choice for smart homes. Each of the 32 tutorials contains an interactive simulation of the wave process being discussed, plus a set of problems to encourage self-paced exploration. Ways that waves can interact with matter and examples. 5C, 2C and beyond. FCC Public File; [email protected] Intraday and long term charts. Join Today!. Included in this Interactive Notebook product: - Wave Terms flip book - Drawing Page - BCR - Multiple Choice - Compressional vs. Zoom from the edge of the universe to the quantum foam of spacetime and learn about everything in between. EM waves are used for communication with satellites and for observing the Earth from space. Light is an electromagnetic wave caused by excited electrons. Grid interactive, or bimodal, inverters can export power to the utility grid, but can also supply emergency backup power for critical loads during a grid outage. , you will find Explainers assisting visitors to interpret exhibits and presenting hands-on demonstrations on the science of flight. This page outlines WaveRunner 30 years history. Sound is a type of energy made by vibrations. We're a team of three developers, each with our own unique skill sets and experiences both in gaming, art, illustration, programming and film. This usually involves turning lessons into games or fun projects. Suitable for online lectures, technical and vocational education, workplace learning, campus tours, and virtual field trips. Many elementary units focus exclusively on marine mammals, but there is much more to explore!. The Doppler Effect Sound demonstration will play through your sound card. The Interactive Ear The ear is the organ which controls hearing and balance, allowing us to understand our surroundings and position ourselves correctly. This causes waves to form. Or use the old. Sine wave line interactive ups products are most popular in Mid East, Southeast Asia, and Africa. The Steele third-party solution combines due diligence with cloud-based automation and advisory services that help organizations comply with regulatory and third-party compliance requirements. The Guide to Grammar and Writing is sponsored by the Capital Community College Foundation, a nonprofit 501 c-3 organization that supports scholarships, faculty development, and curriculum innovation. You can ensure product safety by selecting from certified suppliers, including 4,310 with ISO9001, 1,361 with ISO14001, and 676 with OHSAS18001 certification. Learn how they take FULL care of customers. You can ensure product safety by selecting from certified suppliers, including 4,310 with ISO9001, 1,361 with ISO14001, and 676 with OHSAS18001 certification. Below is an interactive illustration that explores particle and energy motion for the three wave types listed above. Light Wave (Light, Properties of Electromagnetic Waves, Electromagnetic Spectrum) | Physics | Interactive Simulation | CK-12 Exploration Series. Download original Guitar Pro tab. Frequency is cycles per second. Moreover, our creations have also been used in Winema, the first interactive cinema in the Philippines, as well as in the Philippine Ad Congress plenary. See also: Examples of various wave interference patterns. (WVE) Wave Life Sciences Ltd. What you will see is explained here. Another version with movable drums. 2 people questioned in Birmingham 3-year-old's abduction facing unrelated charges Interactive Radar. Evasion Members Publications Images. Explore math with desmos. This Sea of Thieves interactive world map shows locations for points of interest such as outposts, skeleton forts, cannons, ammo crates, riddle clues, animals, cargo runs and more. National Geographic Kids. The P80 is a pure sine wave line interactive UPS that protects critical data and equipment from power problems while supplying clean and reliable network grade power. P80 units are the highest efficiency available, providing utility cost savings at all load levels. It is designed to be printed front to back and can be assembled by the students themselves. Focusing on performance applications we create positive emotions that promote and sell brands across the globe. Our area of expertise is creating websites with dynamic content, we excel in creating highly visual sites that keep your visitors coming back for more. Students will interpret diagrams of transverse and longitudinal waves, answer multiple-choice questions, and write about waves. " At certain points, the two incident waves vibrate in phase and ther total amplitude observed is greater than the amplitude of each individual wave. Interactive Hurricane Tracker powered by Google Maps, a Stormpulse alternative. Indianapolis Interactive Radar - Weather - 13 WTHR Indianapolis Skip to main content. TwistedWave, an audio editor. Wave sources and mediums are provided for water, sound, and light so users can compare the behavior of different types of waves. angular distance around Earth's surface from the source to. Constantly updated values for x position, y position, velocity, and acceleration describe each wave, and their sum. When operating from battery power, a line-interactive UPS system generates the waveform of its AC output. A vibrating piston at the left end is causing these disturbances. The National Air and Space Museum Explainers Program is generously funded by GE Aviation. Collapse of the Wave Function and Our Awareness. Wave Characteristics & Terminology Waves have characteristics closely related to the characteristics of the particles oscillations. sound:1; longitudinal pressure waves in any material medium regardless of whether they constitute audible sound…. (You can also choose to display a square wave. -Describe. HomeControl Flex allows you to meet the growing demand for interactive services. Exploratorium Exhibit Collection. Website Detail Page. Chromoscope lets you explore our Galaxy (the Milky Way) and the distant Universe in a range of wavelengths from gamma-rays to the longest radio waves. Amplitude – For transverse waves, it is the maximum height of the wave. Plucking strings of different lengths results in a variety of sounds, some can be high pitched while others can be very low pitched. Show different properties of sound waves. Start studying SOUND - 4th grade science. Intraday and long term charts. In this example, you can almost do it in your head, just by looking at the original wave. video calendar, you will always have fresh content to post on social and beyond. at a super affordable price. Find addition, subtraction, multiplication and division flashcards, from basic math facts to 3-digit problems. WAVE uses AI (Artificial Intelligence) and ML (Machine Learning) to personalize teaching and to increase engagement. Note that the highest wave height of an individual wave will be significantly larger. STEM Cases, Handbooks and the associated Realtime Reporting System are protected by US Patent No. 1-PS4-1 Waves and Their Applications in Technologies for Information Transfer Plan and conduct investigations to provide evidence that vibrating materials can make sound and that sound can make materials vibrate. We love doing simple science experiments and every once in a while, we find a GEM. Each molecular orbital has a specific energy-level and a specific shape, and each can be occupied by a maximum of two electrons with opposite spins. This is how many noise-cancellation devices work. We make it easy for you to switch from your current security equipment to our interactive system. Most waves form when wind blows across the water’s surface, transferring energy to the water. The Kontakt Group. video calendar, you will always have fresh content to post on social and beyond. This is a collection of interactive tutorials on the fundamentals of waves. General Physics Animations. After completing this unit, you’ll be able to: State and contrast the two methods for making widgets interactive. They are not because the displacements of the particles at the former are zero while those at the latter displace from thier equilibrium positions the most. The Earthquake Event Page application supports most recent browsers, view supported browsers. Music speaker moving jumping around. These sound waves are formed by objects vibrating (shaking back and forth). Featured Posts. To describe the traits of a wave, there are a few terms you need to know. At Emrah Interactive Marketing and Business Development, we specialize in marketing strategies and plans to improve, grow and expand their business. Virtual Labs and Simulations for Physcial Science. Watch a string vibrate in slow motion. Begin by compiling a selection of different sounds from sound effects and nature CDs, available at the public library. SXSW is a conference and festival that includes the interactive, film and music industries held in Austin. The software is designed for time domain acoustic and ultrasound simulations in complex and tissue-realistic media. The division by 8 is because our signal extends from x = −8 to x = 8, and the cos(x) function here actually repeats every 2 units instead of every 2 π units for convenience. Billions of Birds Migrate. Relying on a procedural wave model, the method restricts computations to the visible part of the ocean surface, adapts the geometric resolution to the viewing distance and only considers the visible waves wavelengths. The amplitude is the height of the wave from equilibrium. FlipItPhysics offers a carefully designed online homework engine that provides a space for students to put into practice what they learned during their PreLecture and classroom experience. Insert the Wave/PC™ software CD into your computer’s CD-ROM drive. Housing Stability Learning Lab: Social Connectedness - 38 Seats Left. When an established OR a growth company wants to make that comprehensive digital footprint, Wave Interactive is the place to start. Each of the 32 tutorials contains an interactive simulation of the wave process being discussed, plus a set of problems to encourage self-paced exploration. When an earthquake occurs, the shockwaves of released energy that shake the Earth and temporarily turn soft deposits, such as clay, into jelly (liquefaction) are called seismic waves, from the Greek. ), refraction, resonance, phased arrays, and the Doppler effect. Mapa de últimos terremotos incluso boletines, noticias y enlaces. We are New Jersey's only creative marketing agency, serving clientele across the New Jersey, Florida & NYC metropolitan area. Weather Underground's WunderMap provides interactive weather and radar Maps for weather conditions for locations worldwide. When they reach our ears, these waves make the delicate skin of the eardrums vibrate. Interference patterns made by waves from two sources. When traveling through a vacuum, the speed of light is equal to 186,282 miles, or almost 300,000 kilometers, per second. Interactive multimedia tutorials and tests are available for aortic and mitral valve disease, and for supraventricular tachycardias (SVTs), using actual patient sounds, video, and custom animations. Contents cover the nature of a sound wave, sound properties and their perception, behavior of sound waves, resonance and standing waves, and musical instruments. Java applets are used to illustrate the physics. It is designed to be printed front to back and can be assembled by the students themselves. When the applet starts up you will see red and green waves emanating from two sources in the center of a cubic box. Pure Sine Wave Output. Raging Waves brings you the Aussie Mat Dash - a new 6 lane racer that is just 1 of 3 in the world! Take an Adventure and Explore our Interactive Map Park Map. , Tolman 199. //// WAVES - interactive installation //// Artists: Elwira Wojtunik, Popesz Csaba Láng / Elektro Moon Vision Curator: Tomasz Piars Open until January 14th, 2016. 9% + 30¢ fee to process credit cards, and 1% for bank payments (where. Contact: The Human Early Learning Partnership. Abstract & List of Topics Additional information & Errata. Physclips provides multimedia education in introductory physics at different levels. The custom simulation-based training examples in this showcase are representative of the range and types of projects we have developed. You encounter waves all the time in your daily life. Tiny moving animated speaker icon with sound waves. The energy of the new wave is less than the energy of both waves. Sound waves travel through air, water, and solid objects as vibrations. This is a set of interactive tutorials designed to teach the fundamentals of wave dynamics. Waves Transverse Waves. Wave Models Wavewatch III Wavemodel - Global - Regional - Local Wave Models High Fidelity User Controlled Animations. Learning how sound waves work can be an exciting venture for young children, especially if the project is interactive and visually stimulating. Wolfram Demonstrations Project. WAVE Interactive is comprised of a team of Engineers, Usability Experts, Graphic Designers and Project Managers who can bring digital experiences to life. At some points combined waves reinforce one another to create an increased amplitude, constructive interference, yet at other points combined waves interfere with one another to result in a decreased amplitude, destructive interference. Physics is the study of the basic principles that govern the physical world around us. Have fun learning about sound and music with this cool interactive game. Virgin Islands; Latest message for Hawaii, all U. Another version with movable drums. We also allow businesses to accept payments online so you can get invoices paid faster; we charge a competitive 2. Location: Senior Connections. From our first New York office in 2013 today we have presence in 18 cities across the United States, with over 500 Brand Ambassadors attending hundred of events weekly. Interactive Brokers Canada Inc. Each state page also includes information on related health issues such as HIV, hepatitis C, and Neonatal Abstinence Syndrome. In a fault zone, the release of kinetic energy at one fault may increase the stress -- the potential energy -- in a nearby fault, leading to other earthquakes. See current wind, weather, ocean, and pollution conditions, as forecast by supercomputers, on an interactive animated map. For most travelers, the best way to get the most of the experience is by riding a private car. Make waves with a dripping faucet, audio speaker, or laser! Adjust frequency and amplitude, and observe the effects. When they reach our ears, these waves make the delicate skin of the eardrums vibrate. Use this HTML to embed a running copy of this simulation. The evidence of climate change includes heat waves, sea-level rise, flooding, melting glaciers, earlier spring arrival, coral reef bleaching, and the spread of disease. Apple Watch is the ultimate device for a healthy life. com customer account here. WAVE is an interactive installation for Digital Design Days – OFFF 2016 in Milan. Interactive Games Running Man Group Motion Games Augmented Reality Motion Games Product as Controller Sound Games/Displays Throw Wall Bike Charger Interactive Floor Giant Scratch Card Interactive Climbing Wall Footpad Games Hole in the Wall Photobooth Motion Sensed Shooting Games Interactive Vendo. Teacher resources and professional development across the curriculum. Figure A illustrates the difference between longitudinal and transverse waves. Stay ahead of the weather with our local, national and world forecasts. OSCILLOSCOPE & SOUNDS - Simulation | Interactive flash animation to display the form of an audio signal. Interactive Games Running Man Group Motion Games Augmented Reality Motion Games Product as Controller Sound Games/Displays Throw Wall Bike Charger Interactive Floor Giant Scratch Card Interactive Climbing Wall Footpad Games Hole in the Wall Photobooth Motion Sensed Shooting Games Interactive Vendo. Latest Tsunami Event Messages. Experiment with a range of musical instruments such as a guitar and drums while learning about the pitch and loudness of various sounds with this fun game for kids. Its conclusions, including time dilation, length contraction, and E=mc 2 have changed profoundly our ideas of time and space, matter and energy. South by Southwest® (SXSW®) celebrates the convergence of the interactive, film, and music industries. Our wave simulator takes that unpredictability out of the equation. ) The Soundry. WAVE uses AI (Artificial Intelligence) and ML (Machine Learning) to personalize teaching and to increase engagement. 6 Interactive Smith Chart. We present an adaptive scheme for the interactive animation and display of ocean waves far from the coast. Latest message for US mainland, Canada, Puerto Rico and the U. Interactive controls are available to alter the graph dynamically. With this software you can investigate how sound waves travel through the air. com - UHF / VHF TV Reception Maps - USA. This includes web design and development, lead generation, graphic design and strategic business consulting to help our clients make their marketing vision a reality!. Learn how they take FULL care of customers. Wave Model - North Atlantic Sea Height Mouse-over or tap image to expose Control Buttons to stop, step forward or step back through the images. Everybody who shares ACM SIGGRAPH’s love for computer graphics and interactive techniques is warmly invited to join ACM SIGGRAPH and attend SIGGRAPH or SIGGRAPH Asia. A longitudinal P wave has the ability to move through solid rock and fluid rock, like water or the semi-liquid layers of the earth. You must enter 2 values and then select the units desired for the output before clicking the "Calculate" button to determine the unknown values. © Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Rd, Ithaca, NY 14850. Weather Underground’s WunderMap provides interactive weather and radar Maps for weather conditions for locations worldwide. It demonstrates waves in two dimensions, including such wave phenomena as interference, diffraction (single slit, double slit, etc. Radio waves are bounced off the ions and reflect waves back to earth. Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium. Change frequency, hear it. Third Wave Digital produces these incredible interactive campus maps with the goal of familiarizing the student with important landmarks, buildings, and other areas. Tropical cyclones often develop along easterly waves. THE COMPLETE PHYSICAL SCIENCE INTERACTIVE NOTEBOOK ** Note: This product is a compilation of all Physical Science chapters and bundles from my store. video calendar, you will always have fresh content to post on social and beyond. 3 Phase Lead/Lag 1. once you release, the plane will start moving and emitting sound waves. Period – The time it takes for one wave to go by. Question of the Day is a method used by Dr. com (502) 561-4140; EEO Report; Closed Captioning. We've gathered more than 3 Million Images uploaded by our users and sorted them by the most popular ones. During the presentation of lecture information on wave characteristics and properties, students take notes using a handout. (WVE), a biotechnology company focused on delivering transformational therapies for patients with serious, genetically-defined diseases, today announced that the U. Interactive Tutorials Basic Electromagnetic Wave Properties. Drag to draw the velocity vector. Welcome to Weather Wiz Kids®! I’m meteorologist Crystal Wicker. Our full suite of products, along with concept design and planning services, makes us a one stop shop for all your water park needs. the number of waves that pass a certain. How are ocean waves created? How are lake waves created? Where are the tallest waves on earth found? What makes them? How does an underwater structure affect a wave? Where is the best surfing and why? How do waves affect coastlines?. Your gift is important to us and helps support critical opportunities for students and faculty alike, including lectures, travel support, and any number of educational events that augment the classroom experience. Surendranath, Hyderabad, India. Wavelength - The distance between two successive, identical parts of the wave. Study the motion of waves on a string and the effect of tension, density and damping upon their behavior with the Slinky Lab Interactive. FCC Public File; [email protected] Animated Beach Waves Wallpaper. Torrence and G. Waves - Interactive Online Activities. This java applet let you combine sine waves and hear the result. The evidence of climate change includes heat waves, sea-level rise, flooding, melting glaciers, earlier spring arrival, coral reef bleaching, and the spread of disease. This site uses high speed video and animations to help explain waves and acoustics. The Forrester Wave report evaluates the 12 most significant performance marketing agencies across 28 criteria, including paid search, paid social, programmatic display, eCommerce advertising, and SEO. Wave Demonstrations -in water and as sound and light. MOUSEOVER the vertical range of each color bar to give it a sudden excitement of size. 8th Grade Science Waves Unit Information Milestones Domain/Weight: 40% Energy and Its Transformation Introduction to Waves interactive - Manipulate the size. We are New Jersey's only creative marketing agency, serving clientele across the New Jersey, Florida & NYC metropolitan area. From the distance graph the wavelength may be determined. Your digital marketing efforts need some stability. com (502) 561-4140; EEO Report; Closed Captioning. It is particularly important in understanding the properties of subatomic particles. Learn vocabulary, terms, and more with flashcards, games, and other study tools. View the latest news and breaking news today for U. Learn about changing sounds and music as you experiment with different musical instruments in this fun, interactive activity. Interference patterns made by waves from two sources. After color bars become excited, they gradually fall back to a null state. There is disclosed a wave pool consisting of a pool with a wave generator at the deep end, which creates waves that advance toward the shallow end. Access your presentations directly on the WAVE + LILY with apps such as Dropbox, Powerpoint, and Touchjet Present, using the LILY Digital Pen to flip through presentations and to annotate. From the distance graph the wavelength may be determined. Interactive diagram allows user to vary refractive indices for mediums, and vary angle of incedence to see how beam bends at interface. Introduction to the Elliott Wave Theory. Pluck a guitar string and show that the string vibrates as the sound is issued. Use the ADT Control app to: Control your small appliances with smart plugs Set your home temperature with a smart thermostat. Reflection and Refraction between Taut Strings The Reflection and Refraction between Taut Strings model displays the motion of a traveling pulse on a string when it is incident on a change of string density. Design an experiment to measure the speed of the wave. The lines represent P-waves radiating out from the earthquake. Carbon Brief has extracted data from around 70 peer-reviewed climate studies to show how global warming is projected to affect the world and its regions. Learn how they take FULL care of customers. When they arrive at your ears, louder sounds push harder against your eardrums. Free Driving Directions, Traffic Reports & GPS Navigation App. A collection of games, apps and art made by Paul Neave. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: