Physical Chemistry Simulations Interactive Demonstrations 1. Interactions Illustrates the intramolecular bonding and nonbonding interactions used in molecular mechanical forcefields: Bond deformation: quadratic Bond deformation: Morse Bond angle deformation: quadratic Torsion angle deformation Out-of-plane deformation Lennard-Jones London-van der Waals Electrostatic Coulombic Plots the energy as a function of the relevant coordinate. 5. Illustrates the Maxwell-Boltzmann distribution of velocities and speeds for a specified temperature. 7. Illustrates the steepest descents and simulated annealing minimization methods. Chernobyl: The catastrophe that never ended The following is a script of "Chernobyl" which aired on Nov. 23, 2014. Bob Simon is the correspondent. Michael Gavshon and David Levine, producers. Some tragedies never end. It's called the Zone and getting into it is crossing a border into one of the most contaminated places on Earth. Bob Simon: You know when you think about it, you have this massive project going on. Nicolas Caille: Yeah, yeah, yeah, you're right. The disaster was sparked by massive explosions that tore the roof off of Chernobyl's reactor number four, spewing radioactive dust into the atmosphere. The Soviets drafted over half a million troops to put out the fire and clear the nuclear debris. But as this recent video shows, the reactor is still packed with poison: heaps of gnarled steel and concrete, pools of nuclear fuel that have hardened into a dense mass called the "elephant's foot." Nicolas Caille: We will push it in once, the average speed it will be around 10 meters an hour. Bob Simon: Right.
ChemCollective Molecular Workbench Three Views of MW Senior Scientist and Molecular Workbench Developer Charles Xie, Researcher and Manager Amy Pallant, and Technology and Curriculum Developer Dan Damelin describe the history of Molecular Workbench and our vision for the future. Watch the Video undefinedundefinedundefined Selected Curriculum Modules Transistor Semiconductor Plasma Molecular Rover Chemical Bonding Chemical Resp. Diffusion Heat & Temperature Electrostatics Phase Change DNA to Protein Mission: Immunity Lipids & Carbs Tree of Life Proteins & DNA Harvest Light Quantum Mechanics Crystallography More Modules » Launches MW Create Your Own Simulations MW is not just a collection of simulations—do not be deceived by first glance. Learn More in MW's Online Manual » Launches MW Create Your Own Curriculum Modules A simulation without instructional support is difficult for students to use. Learn More in MW's Online Manual » Launches MW Fun Stuff Electrostatic Maze 3D Maze Roving Nanogear Block Feeder Probability Machine Dainty Walker Water Wheels
Electrophilic aromatic substitution - Nitration of benzene j2s/core/package.js -- required by ClazzNode ajax=false async=true j2s/core/core.z.js JSmol exec jmolApplet0 start applet null Jmol JavaScript applet jmolApplet0__697102047627644__ initializing Jmol getValue debug null Jmol getValue logLevel null Jmol getValue allowjavascript true AppletRegistry.checkIn(jmolApplet0__697102047627644__) vwrOptions: setting document base to " (C) 2012 Jmol Development Jmol Version: 14.3.13_2015.03.23 2015-03-23 07:22 java.vendor: Java2Script (HTML5) java.version: 2015-03-01 07:13:29 (JSmol/j2s) os.name: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:17.0) Gecko/20100101 Firefox/17.0 Access: ALL memory: 0.0/0.0 processors available: 1 useCommandThread: false appletId:jmolApplet0 (signed) j2s/core/corescript.z.js -- required by ClazzNode ajax=true async=false Jmol getValue emulate null defaults = "Jmol" Jmol getValue boxbgcolor null Jmol getValue bgcolor white backgroundColor = "white"
ChemCollective Welcome to Virtual Labs Movie Sheets - Teacher Submitted Movie Worksheets for the Classroom Curiosity Cabinet Over the past 25 years I have accumulated a collection of various gizmos, devices, toys etc. which to me are excellent examples of scientific principles or things that you look at and you say "That's impossible!" except it's staring you in the face. In the hope that others may also find them interesting and with the help of two undergraduates, Jacy Lundberg and Omar Khan, we have created videos of many of the items in the collection. Jacy and Omar are currently seniors in the Boston College pre-medical program. In the olden days some people assembled what were known as curiosity cabinets.
The Cavalcade o' Chemistry | Your online chemistry source since 1998 or thereabouts