Geodesic Dome Model
The EJS Cellular Automata Rules Model shows a spatial lattice which can have any one of a finite number of states and which are updated synchronously in discrete time steps according to a local (nearby neighbor) rule. You can change the lattice size, pick different rules (0 to 255 as classified...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.3 MB | Download (36): Cellular Automata Rules Model Download |
The Lagrangian Pendulum Spring model asks students to solve the Lagrangian for a spring-pendulum and then develop a model of it. It is distributed as a ready-to-run (compiled) Java archive. Double-clicking the ejs_CM_Lagrangian_pendulum_spring.jar file will run the program if Java is installed....
Platforms: Mac
License: Freeware | Size: 1.3 MB | Download (34): CM Lagrangian Pendulum Spring Model Download |
The Fourier sine series model displays the sine series expansion coefficients of an arbitrary function on the interval
Platforms: Mac
License: Freeware | Size: 1.4 MB | Download (38): Fourier Sine Series Model Download |
The STP XY Model program implements a Monte Carlo simulation of the planar ferromagnet or XY Model of spins on a lattice. The simulation returns the configuration of spins with the option of showing the vortices. The default system is a lattice of linear dimension L = 20 at temperature T = 0.89....
Platforms: Mac
License: Freeware | Size: 489.47 KB | Download (41): XY Model Download |
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...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 10.24 KB | Download (36): Lennard-Jones Potential Model For Fac Download |
The Ejs Wave Function Plotter model displays a one-dimensional wave function u(x,t) depicting a disturbance at position x and time t. The disturbance can be mass density, pressure, or electric field depending on the physical context. The default wave function is sinusoidal but any other analytic...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.2 MB | Download (36): Wave Function Plotter Model Download |
The Kicked Rotor model shows the dynamics of a rotating bar (rotor) that is kicked periodically. This model is also known as the standard map or the Chirikov-Taylor map. Each impulsive kick changes the angular momentum of the rotor instantaneously and the bar rotates uniformly between kicks....
Platforms: Mac
License: Freeware | Size: 737.28 KB | Download (36): Kicked Rotor Dynamics Model Download |
The Ejs Hard Sphere Gas model displays a three-dimensional (ideal) gas made out of hard disks. Particles are initialized with a random speed and in a random direction and move with constant velocity until a collision occurs. You can modify this simulation if you have Ejs installed by...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.45 MB | Download (39): Hard Sphere Gas Model Download |
The Newton's Law of Cooling model computes the temperature of an object of mass M as it is heated by a flame and cooled by the surrounding medium. The model assumes that the temperature T within the object is uniform. This lumped system approximation is valid if the rate of thermal energy...
Platforms: Mac
License: Freeware | Size: 1.2 MB | Download (36): Newton's Law of Cooling Model Download |
The EJS Cellular Automata (Rule 90) model displays a lattice with any one of a finite number of states which are updated synchronously in discrete time steps according to a local (nearby neighbor) rule. Rule 90 is a specific nearby neighbor rule following the classification scheme developed by...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.2 MB | Download (35): Cellular Automata (Rule 90) Model Download |
The Ejs Harmonics and Fourier Series model displays the sum of harmonics via a Fourier series to yield a new wave. The amplitude of each harmonic as well as the phase of that harmonic can be changed via sliders. In addition, several pre-set functions can be chosen to display. You can modify this...
Platforms: Mac
License: Freeware | Size: 1.34 MB | Download (38): Harmonics and Fourier Series Model Download |
The Ejs Free Fall model displays the dynamics of a ball dropped near the surface of Earth onto a platform. The initial conditions for the ball are zero initial velocities in the x and y directions. The coefficient of restitution for the ball's collision with the platform is less than one. The...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.2 MB | Download (36): Free Fall Model Download |
The Binomial Coefficient model displays the number of ways k objects can be chosen from among n objects when order is irrelevant. This number is known as a binomial coefficient and can be used to predict the the flipping of n coins with equal probability of heads and tails. The Binomial...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 737.28 KB | Download (35): Binomial Coefficient Model Download |
The Falling Slinky model approximates a slinky using twenty masses connected with light springs. The slinky is suspended from one end and released. Two actions will occur simultaneously when it is released hanging at rest from its equilibrium position - it will fall and it will collapse. What...
Platforms: Mac
License: Freeware | Size: 102.4 KB | Download (36): Falling Slinky Model Download |
The EJS Binomial Distribution Model calculates the binomial distribution. You can change the number of trials and probability. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item. The Binomial...
Platforms: Mac
License: Freeware | Size: 81.92 KB | Download (37): Binomial Distribution Model Download |
The Ejs First Law model displays the dynamics of a ball subject to no net force. The initial conditions for the ball are an initial velocity in the x and y directions. The initial position of the ball can be changed by dragging it when the simulation is paused. You can modify this simulation if...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.15 MB | Download (36): First Law Model Download |
This computer model allows students to split a vector into its components and practice finding the magnitude and direction. In addition, it offers a "Find components" mode, where magnitude and direction of the vector are given and the student's task is to find the x-component and the y-component...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 1.35 MB | Download (41): Vector Components Model Download |
The Ejs Coupled Oscillators and Normal Modes model displays the motion of coupled oscillators, two masses connected by three springs. The initial position of the two masses, the spring constant of the three springs, the damping coefficient for each mass, and the driving force and driving force...
Platforms: Mac
License: Freeware | Size: 1.35 MB | Download (45): Coupled Oscillators and Normal Modes Model Download |
The Kepler System model simulates Kepler's final theory of planetary motion. In this theory the planets orbit in ellipses with Sun at one focus (Kepler's First law). These elliptical orbits are not necessarily all in the same plane. A line from Sun to the planet sweeps out equal areas in equal...
Platforms: Mac
License: Freeware | Size: 1.35 MB | Download (37): Kepler System Model Download |
The Ejs Celestial Globe model simulates the Two Sphere Universe theory of the Ancient Greeks. This theory supposes the stars to be fixed on the surface of a Celestial Sphere, with the spherical Earth at the center of this sphere. The simulation shows the motion of Sun and stars in this model, as...
Platforms: Mac
License: Freeware | Size: 1.29 MB | Download (35): Celestial Globe Model Download |