Latest Physics Model
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Earth Orbit Model v.1.0
Earth Orbit model illustrates the Copernican theory of Earth's orbit around the sun. The top window shows a view from outside the celestial sphere. The simulation shows the moving Earth along with its axis or rotation and the line of sight from Earth, ...
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Random Walk 2D Model v.1.0
EJS Random Walk 2D Model simulates a 2-D random walk. You can change the number of walkers and probability of going a given direction. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs ...
Radioactive Decay Model v.1.0
Radioactive Decay Model simulates the decay of a radioactive sample using discrete random events. It displays the number of radioactive nuclei as a function of time. You can change the initial number of nuclei and the decay constant as well as changing ...
Standing Waves on a String Model v.1.0
Standing Waves on a String model displays the motion of a standing wave on a string. The standing wave can be augmented by adding the zero line and the maximum displacement of the string. The number of standing waves shown can be changed via a slider.
Magnetic Bar Field Model v.1.0
Magnetic Bar Field Model shows the field of a bar magnet and has a movable compass that reports the magnetic field values. The bar magnet model is built by placing a group of magnetic dipoles along the bar magnet. You can modify this simulation if you ...
Waveguide Model v.1.0
Waveguide model displays the motion of a traveling wave forced to move between two walls in a waveguide. The two walls are located at y = 0 and a, so that its normal modes are u(t,x) = A sin(n y/a) cos(k x - t) with n a positive integer. The phase velocity ...
Two Particle Elastic Collision Model v.1.0
Two Particle Elastic Collision Model allows the user to simulate a two-dimensional elastic collision between hard disks. The user can modify the mass, position and velocity of each disk using the sliders. Both disks are draggable and the center of mass ...
Parallel Plate Capacitor Model v.1.0
Parallel Plate Capacitor model displays a parallel-plate capacitor which consists of two identical metal plates, placed parallel to one another. The capacitor can be charged by connecting one plate to the positive terminal of a battery and the other ...
Pendulum Motion in Phase Space Model v.1.0
The Ejs Pendulum Motion in Phase Space model displays the dynamics of an ensemble of pendula in phase space (velocity versus position). Friction is set to zero. For the pendulum ensemble, the motion is shown both in a traditional phase-space plot and ...
Phases of Venus Model v.1.0
Venus Phases model shows the shadows cast by two gnomons at different locations on Earth. For one gnomon the sun is directly overhead (as would be the case if the gnomon was on the Tropic of Cancer at the summer solstice). The other gnomon is due north ...
Random Walk 1D Continuous Model v.1.0
Random Walk 1D Continuous Model simulates a 1-D random walk with a variable step size. You can change the number of walkers and probability of going right and left. You can modify this simulation if you have Ejs installed by right-clicking within the ...
Ejs Hard Disk Collision Model v.1.0
The Ejs Hard Disk Collision model displays a two-dimensional collision between two hard disks. The two disks have the same mass and only one mass is moving at the beginning of the simulation. The impact of the collision is offset by the impact parameter, ...
Magnetic Field from Loops Model v.1.0
The EJSMagnetic Field from Loops model computes the B-field created by an electric current through a straight wire, a closed loop, and a solenoid. Users can adjust the vertical position of the slice through the 3D field.The Magnetic Field from Loops ...
Kicked Rotor Dynamics Model v.1.0
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 ...