Coulomb

The 3-D Hydrogen Atom Probability Densitites model simulates the probability density of the first few (n = 1, 2, and 3, and associated l and m values) energy eigenstates for the Hydrogen atom (the Coulomb potential). The main window shows the energy level diagram for the solutions to the Coulomb... Platforms: Mac

The Point Charge Forces in One-Dimension model investigates the electric force that one charged particle exerts on another. It is a very simple representation that promotes understanding of Coulomb's Law in three ways: First, students can set the amount of charge on each particle and view vector... Platforms: Mac

Tochnog is a finite element analysis program. It provides parallel and distributed solvers, 2D beams and trusses. The department of foundation engineering and tunneling of Ed. Zueblin A.G., Germany, sponsors the integration of hypoplasticity in Tochnog. A state-of-the-art version (automatic... Platforms: *nix, C/C++, BSD

Joe engineer's script works in radians and meters. The lab data files are in degrees and inches and the drawings are in mm. Joe tags everything with dimensions and never worries again about conversions. He even discovers a bug where a value he thought represented area really represents... Platforms: Matlab

mpmath is a replacement for Python's float/complex types and math/cmath modules with unlimited precision and exponent sizes. The mpmath software is written entirely in Python without any external dependencies and hence runs almost anywhere, without the need for compilation. To install, unpack... Platforms: Mac

The Three Point Charges is an inquiry-based model for exploring the force between charged objects. Initially, the simulation sets up three charged objects, one at each corner of an equilateral triangle. The charges have different magnitudes, represented by force vectors. The charges can be moved,... Platforms: Mac