Software Listing of Author : "Andrew Duffy"
- Electric Force in One Dimension
- License: Freeware
- Price: 0.00


In this simulation, you can investigate the electric force that one charged particle exerts on another.
The electric force is shown in three ways. First, particle 2 can be dragged left or right to sample the force at various locations - the force on each particle is shown with an arrow. Second, the numerical value of each force is shown in the table at the bottom. Third, you can check the box at the top of the menu to plot a graph of the electric force as a function of position. For the graph (and the numerical values), we define positive force as a force pointing to the right, and negative force as a force pointing to the left.
- Publisher: Andrew Duffy
- Date Released:
- Download Size: 1413 KB
- Download
- Platform: WinOther
- Longitudinal waves
- License: Freeware
- Price: 0.00


Using this simulation, you can investigate longitudinal traveling waves. Sound waves traveling through the air are good examples of such longitudinal waves.
In a longitudinal traveling wave, the particles in the medium oscillate back and forth along the same direction that the wave itself is traveling. In this model, the colored balls show the average position of air molecules in the vicinity of each ball.
The model also shows, for reference, the corresponding transverse traveling wave.
- Publisher: Andrew Duffy
- Date Released:
- Download Size: 1413 KB
- Download
- Platform: WinOther
- Standing waves on a string
- License: Freeware
- Price: 0.00


This simulation deals with the standing waves that can be produced on a string, such as on a guitar string. On such a string, the ends of the string are fixed. In the simulation, you can select from the fundamental frequency of the string, or the second, third, fourth, or fifth harmonic.
Standing waves are produced from constructive interference between two identical waves, one traveling to the right and one traveling to the left. Completely constructive interference occurs only in particular cases, when there is a special relationship between the wavelength of the traveling waves and the length of the string (the length happens to be 2 m, in this simulation). You can examine that special relationship with this simulation.
- Publisher: Andrew Duffy
- Date Released:
- Download Size: 1402 KB
- Download
- Platform: WinOther
