Watch a reaction proceed over time. How does total energy affect a reaction rate? Vary temperature, barrier height, and potential energies. Record concentrations and time in order to extract rate coefficients. Do temperature dependent studies to extract Arrhenius parameters.
Charges and Fields
Move point charges around on the playing field and then view the electric field, voltages, equipotential lines, and more. It's colorful, it's dynamic, it's free.
Lennard-Jones Potential Model
The EJS Lennard-Jones Potential model shows the dynamics of a particle of mass m within this potential. You can drag particle to change its position and you can drag the energy-line to change its total energy. The Lennard-Jones potential function is a reasonably accurate model of interactions between noble gas atoms. The binding energy epsilon is the depth of the potential well and minimum molecular separation are set equal to unity. This simulation uses uses a natural system of units the m
Molecular Dynamics Demonstration Model
The EJS Molecular Dynamics Demonstration model is constructed using the Lennard-Jones potential truncated at a distance of 3 molecular diameters. The motion of the molecules is governed by Newton's laws, approximated using the Verlet algorithm with the indicated Time step. For sufficiently small time steps dt, the system's total energy should be approximately conserved. Users can select various initial configurations using the drop down menu.
Understanding Your Water
Over two class periods, you will be guiding your students through the basics of water treatment -- both tap water treatment and sewage (or wastewater) treatment. To prepare for the lessons on the treatment process, the students will be researching where their drinking water comes from and where their wastewater goes once it goes down the drain for homework. After learning about their local water treatment and traditional tap water and sewage treatment processes, students will watch the NewsHour
From Page to Stage
Musical theater book writers, lyricists, and composers have long looked to literature for their inspiration and subject material. In this lesson, students will compare and contrast literary works and the musicals they inspired. Utilizing video clips and Web sites, students will compare specific passages from original texts to moments in Broadway musicals on which they were based, and analyze similarities and differences between the two. As a culminating activity, students will try their hand at
Hey, Mr. Producer!
It's not that uncommon for secondary school students to study the ups and downs of the stock market, but in this lesson, students will examine the economic roller coaster involved in the production of a Broadway musical. As an introduction to the lesson, students will read a series of online articles to investigate the similarities and differences between nonprofit theater production and Broadway, or commercial, theater production. They will view excerpts from the PBS series BROADWAY: THE AMERIC
The simulation program is based on the Nobel Prize winning Hodgkin-Huxley model for excitation of the squid axon. The program simulates an excised squid axon by applying stimuli or clamps after setting the environment of the axon, changing its properties, and/or adding drugs or toxins. By using the program tools, experiments can be developed that explore a variety of nerve properties, ranging from classical phenomena such as threshold, summation, refractory period, and impulse propagation to mo
Joint source-channel decoding for robust transmission of video
Motivated by the need for robust transmission of video, an approach to joint-source channel decoding is presented. While this work is focused on transmission of video, the results are applicable to most forms of multimedia. A general overview of the proposed video coding system is given and its individual components are introduced. Since correct reception of synchronization patterns is essential for successful decoding of compressed bitstreams, detection of a periodically embedded synchronizatio
Mixed Reception Scenario
This activity is set in a research group that is developing an antivenom for spider bites. In the opening scene, Nelson Pogline, a talented graduate student, dies unexpectedly at a university reception. As a detective, you must use chemistry concepts to determine if this was murder and if so, solve the case. You can interview suspects using Quicktime movies, investigate the crime scene for clues with Quicktime Virtual Reality images, and analyze the evidence from the crime lab. This activity req
We are now ready to pull everything we know about reaction stoichiometry together, and answer the question: Given some initial amount of reactants, what should be present after a chemical reaction goes to completion? The procedure for answering this question is often called the "limiting reagent problem." You'll see why this name is appropriate in the following video.
Essential Science for Teachers: Earth and Space Science: Session 6. Restless Landscapes
If almost all mountains are formed the same way, why do they look so different? In this session, participants learn about the forces continually at work on the surface of the Earth that sculpt the ever-changing landscape.,Students and scientists explore the question: Where does the sand at the beach come from?
American Women's Dime Novel Project
Dime novels written by women were once enormously popular with their readers, but the genre has been neglected for most of its history by scholars, collectors, and libraries. The genre suffers from the double burden of being both popular and written for working-class women. This project hopes to overcome the history of oversight to both the form and its readers by providing information about the novels themselves, the authors, the readers, and nineteenth century public reaction. This site is a
Introduction to Metamorphism
This 83-slide PowerPoint presentation introduces metamorphic agents and changes. Stress, strain, tension, compression, and shear are discussed as well as the lineation or foliation that results from such effects. Metamorphic classification includes dynamic, thermal, thermo-dynamic, contact, regional, and shock metamorphism. Specific regional metamorphic events are discussed in detail, including the Scottish Highlands, Otago, New Zealand, paired metamorphic events of Japan, the Skiddaw aureole, U
Linkage Mapping a Mutation in Arabidopsis
Since Alfred Sturtevant constructed the first genetic map of a Drosophilachromosome in 1913, new mutations have been mapped using his method of linkage analysis. Determining the map position of a new mutation -- and its corresponding gene -- consists of testing for linkage with a number of previously mapped genes or DNA markers. Linkage is the principle that the closer two genes or markers are located to one another on a chromosome, the greater the chance that they will be inherited together as
The author's goals in writing Exploring Business were simple: (1) introduce students to business in an exciting way and (2) provide faculty with a fully developed teaching package that allows them to do the former. Toward those ends, the following features are included in this text: 1- Integrated (Optional) Nike Case Study: A Nike case study is available for instructors who wish to introduce students to business using an exciting and integrated case. Through an in-depth study of a real company,
A Few Good Stories: Jaime Guerrero
SPARK drops in on Jaime Guerrero at the Bay Area Glass Institute as he creates an elaborate snake sculpture and introduces his "Homies" series. This Educator Guide is about glass blowing, the dynamic work of Jaime Guerrero, Mayan and Aztec iconography, and the history of glass work in art and architecture.
Physical geography is the study of the earth's dynamic systems -- its air, water, weather climate, landforms, rocks, soils, plants, ecosystems and biomes -- and how humans interact with the earth's systems. Physical geography is the study of the world around you. Everyone, every day, interacts with the earth's dynamic systems. I challenge you to join me on an exploration of the complex, and exciting world in which you live! This is a freshman level college course in physical geography. It requir
Step by Step Krebs cycle
These pages show the steps of the metabolic pathway called the Tricarboxylic Acid (TCA) cycle. Otherwise known as the citric acid cycle and the Krebs cycle. Data sheets, reaction diagrams and animations are provided for each step. Krebs cycle or the citric acid cycle or tricarboxylic acid cycle,occurs in mitochondria, is the common pathway to completely oxidize fuel molecules which mostly is acetyl CoA ,the product from the oxidative decarboxylation of pyruvate. It enters the cycle and passes
Towards a Model of the Digital University:
A Generalized Net Model for Producing
In a series of research papers, the authors have studied some of the most important models of contemporary universities, such as: the research university, the entrepreneurial university and the digital university and construct their Generalized Net (GN) models. This paper is based on the casestudies of Sofia University, the Technical University of Munich and the University of Edinburgh. The main focus is to put the analysis of the processes of the functioning of a university which effectively in