Understand complex ideas through experiments

Change parameters, observe the results, and explore physics, chemistry, biology, and mathematics.

All Simulations

Compare R, RC, RL, and RLC circuits: phase, impedance, resonance.

Explore how filters work! Add activated carbon to polluted water and watch how its porous surface absorbs harmful molecules.

Follow oxidation alcohol → aldehyde → carboxylic acid and compare functional groups.

Find the domain, cancel factors, convert to a common denominator, and discard extraneous roots.

Build squares and rectangles to see why (a+b)², (a-b)², and a²-b² work.

Compare addition vs substitution and see why benzene prefers substitution.

Build a protein molecule! Connect amino acids with peptide bonds and observe the formation of a long polymer chain, the basis of all life.

Learn to measure the world in degrees! Estimate angles by eye, use a virtual protractor, and construct specific angles with high precision.