Investigate collisions on an air hockey table. Set up your own experiments: vary the number of discs, masses and initial conditions. Is momentum conserved? Is kinetic energy conserved? Vary the elasticity and see what happens. * Draw "before-and-after" pictures of collisions. * Construct... Platforms: Mac, Mac OS X v10.4

Keyword: Apply, Change, Collisions, Conservation, Conserved, Determine, Elasticity, Energy, Explain, Hockey, Mean3f, Mechanical, Momentum, Problems, Quotbeforeandafterquot, Representations, Solve, Varies, Varying

The QM Momentum Expectation Value program displays the time evolution of the position-space wave function and the associated momentum expectation value. The default wave function is a Gaussian wave packet in a harmonic oscillator. Additional states and other potential energy functions can be... Platforms: Mac, Mac OSX

Keyword: Clicking, Compiled, Distributed, Eigenstate, Energy, Expansion, Expectation, Found, Function, Mechanics, Momentum, Physics, Program, Programs, Quantum, Readytorun, Source, Visualizations

The QM Spins program simulates the quantum-mechanical measurement of spin-1/2 and spin-1 particles. The default simulation shows the result of measuring the z component of spin on a beam of spin-1/2 particles with a random (or statistical) mixture of spin orientations. Additional initial states... Platforms: Mac, Mac OSX

Keyword: Additional, Archive, Clicking, Daniel, Installed, Macintosh, Measurement, Original, Particles, Physics, Program, Programs, Quantum, Schroeder, Source, Spin, Spins, Spinsjar, Thomas, Written

This simulation gives students a chance to practice two-dimensional vector addition in an interactive format with immediate feedback. The magnitude and direction of two vectors are given; the students' task is to determine x and y components, length of the two vectors, and the resultant sum.... Platforms: Mac, Mac OSX

Keyword: Answersquot, Correct, Created, Editorsthis, Experience, Formal, Front, Generate, Modeling, Models, Programming, Select, Simulation, Simulations, Users, Vector, Vectors

Let's Hear the Animals! (Animal Sounds) HD is an application developed especially for pre-school children to see beautiful pictures of their favorite animals while learning not only their sounds and names, but also how to use a computer!! OS X Lion Tested and Compatible! Let's Hear the Animals!... Platforms: Mac, Mac OS X v10.6

Keyword: Button, Click, Immediately, Introduce, Pronunciation, Reverts, Simpler, Switch, Wonderful

The Three State Nuclear Decay model extends the Two State Nuclear Decay model to simulate the radioactive decay of atomic nuclei in which the parent nucleus first decays into an intermediate state before decaying into a stable state. Although the decay of both the parent and intermediate nucleus... Platforms: Mac, Mac OSX

Keyword: Compare, Decay, Events, Intermediate, Interval, Model, Nuclear, Nucleus, Nuclides, Number, Parent, Simulation, Stable, State, Users

A mass constrained to move on a rotating hoop is an excellent mechanical model of first- and second-order phase transitions. Although the minimum of the potential energy curve corresponds to the bottom of the hoop at low rotation frequency, a spontaneous symmetry breaking (cusp catastrophe)... Platforms: Mac, Mac OSX

Keyword: Advanced, Breaking, Click, Concepts, Distributed, Dynamics, Ejs Mech Lagrangian Rotatingoffaxishoopjar, Elementary, Frequency, Illustrate, Mechanics, Model, Phase, Program, Rotating, Symmetry, Transitionsthe

Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring? Platforms: Mac, Mac OS X v10.4

Keyword: Experiment, Explore, Fluid, Force, Forces, Involved, Length, Measure, Optical, Relationship, Required, Single, Spring, Strand, Stretched, Stretching, Tweezers

The Ejs Quartic Potential Orbit model displays the dynamics of a mass orbiting a much larger mass subject to a quartic potential, C/r4. The simulation displays the motion of the smaller mass and the effective potential energy diagram. The initial energy of the system can be changed via textbox... Platforms: Mac, Mac OSX

Keyword: Archive, Changed, Diagram, Displays, Dragging, Ejs Ehu Central Forces Quarticpotentialjar, Energy, Initial, Installed, Model, Models, Modify, Orbit, Physics, Potential, Project, Quartic, Simulation, Source

The Lite version is only a small sample of the full version. Social Learning Made Easy! The Social Express??a*zNz is an engaging, interactive software application designed for children with autism, Asperger???*a*?s,and ADHD. Our software teaches children how to think about and manage social... Platforms: Mac, Mac OS X v10.6

Keyword: Ability, Benefits, Feelings, Identify, Importance, Include, Interactions, Potential, Understand

The CBCAnalyzer (CBC = compensatory base change) is a custom written software toolbox consisting of three parts, CTTransform, CBCDetect, and CBCTree. CTTransform reads several CT-file formats (ct, RNAviz ct or Mac ct), and generates a so called ``bracket-dot-bracket'' format that typically is... Platforms: Mac, Mac OSX

Keyword: Aligned, Alignment, Based, Cbcdetect, Cbctree, Count, Cttransform, Detecting, Discriminated, Herewith, Important, Input, Phylogram, Primary, Reconstructs, Secondary, Sequences, Structures

The GR Kerr Stone program simulates orbits of an object in the equatorial plane near a rotating black hole using the Kerr metric. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the gr_kerr_stone.jar file will run the program if Java is installed. The default is an... Platforms: Mac, Mac OSX

Keyword: 075gr, Additional, Black, Compadre, Found, General, Model, Momentum, Object, Parameter, Physics, Program, Programs, Relativity, Searching, Source, Stone, Suite, Visualizations

kSpectra Lite is a scientific application to introduce advanced time series analysis, and is a lite version of fully featured kSpectra app in App Store. kSpectra Lite provides a set of powerful tools for analysis of univariate or multivariate time series in various sciences, ranging from... Platforms: Mac, Mac OS X v10.6

Keyword: Frequencies, Import, Level, Named, Panel, Power, Typically

UGENE is a free cross-platform genome analysis suite. It works perfectly on Windows, Mac OS or Linux and requires only a few clicks to install. Features: * Multiple sequence alignment using MUSCLE 3, KAlign, Clustal; * HMM profiles build and search, based on the source of HMMER 2 and HMMER... Platforms: Mac, Mac OSX

Keyword: Anaglyph, Annotation, Blast, Chromatograms, Complex, Custom, Designer, Enables, Files, Formats, Interface, Mafft, Patterns, Query, Stereo, Support, Tcoffee, Viewer, Visualization, Workflow

HEALPix is an acronym for Hierarchical Equal Area isoLatitude Pixelization of a sphere. As suggested in the name, this pixelization produces a subdivision of a spherical surface in which each pixel covers the same surface area as every other pixel. The figure below shows the partitioning of a... Platforms: Mac, Mac OSX

Keyword: 15 And, Acronym, And 31, And The, Arcmin, Blue, Constantlatitude, Degree, Earth, Equal, Healpix, Highresolution Examples, Pixel, Pixels, Yellow Red, Yellow Sphere

The Orbits Within Spherical Galaxies model displays the two-dimensional trajectories of particles (stars) within a galaxy having a spherically symmetric mass distribution that heuristically approximates the distributions found in galaxies and bulges. The model uses a mass density proposed by... Platforms: Mac, Mac OSX

Keyword: Adjustable, Chosen, Clicking, Constant, Developed, Distributions, G3d1the, Galaxies, Galaxy, Gravitational, Model, Modeling, Orbits, Parameter, Powerlaw, Spherical, Total, Typical, Units

a program which enables you to create impressive simulations of complex systems in an easy way. Complex systems appear throughout all parts of our life. You can see them in form of living organisms, social groups, companies, physical processes or chemical structures. Cafun assists students and... Platforms: Mac, Mac OSX

Keyword: Cafun, Complex, Details, Driving, Focusing, Force, Metaphors, Order, Provide, Simple, Simulations, Systems, Understand, World

The Pendulum Motion Model shows the motion of a simple pendulum. You can change the mass of the pendulum bob, the length of the string, the acceleration due to gravity, and the initial position of the pendulum. You can then see the resulting motion of the pendulum, as well as see bar graphs of... Platforms: Mac, Mac OSX

Keyword: Acceleration, Angular, Archive, Clicking, Created, Distributed, Double, Installed, Model, Modeling, Motion, Pendulum, Position, Program, Readytorun, Simulations, Timethe

The Tracker Sampler Package contains several video analysis and modeling experiments from mechanics to spectroscopy. It is distributed as a ready-to-run (compiled) Java archive containing Tracker (video analysis and modeling tool), movies, and some initial analysis. Double clicking the... Platforms: Mac, Mac OSX

Keyword: Additional, Analysis, Compadre, Computertracker, Experiments, Found, Installed, Introductory, Modeling, Package, Physics, Program, Programs, Sampler, Searching, Source, Tracker, Video

The Single-Slit Diffraction model simulates the diffraction pattern of light as it travels through a slit to a screen. The diffraction pattern is due to the difference in path length of the light from different parts of the slit as the light from the slit travels to the screen. The intensity of... Platforms: Mac, Mac OSX

Keyword: Clicking, Created, Diffraction, Distributed, Ejs Diffractionjar, Installed, Light, Model, Modeling, Pattern, Photographic, Platesingleslit, Program, Screen, Shown, Simulations, Travels, Wavelength