The catalogue
37 simulations
Each one runs in the browser and takes a few seconds to understand. Change a number, watch what moves.
Physics
26 simulations
Physics · Wave Optics Young's Double-Slit Experiment Coherent light through two slits paints bright and dark interference fringes.
Physics · Wave Optics Single-Slit Diffraction A single narrow slit spreads light into a broad central band with faint side maxima.
Physics · Wave Optics Circular Aperture — Airy Rings Light through a round hole forms a bright disk ringed by concentric halos.
Physics · Kinematics Crossing a River — Relative Velocity Aim upstream or straight across and watch the current sweep the boat.
Physics · Kinematics Relative Velocity — The River Crossing (Explainer) A guided, step-by-step walkthrough of the river-crossing vectors.
Physics · Kinematics Bouncing Ball on an Incline A ball dropped onto a slope bounces in ever-shifting parabolic hops.
Physics · Circular Motion Ball on a String — Vertical Circle Whirl a ball in a vertical loop and find the speed the string needs to stay taut.
Physics · Laws of Motion Wedge & Pulley — Two Connected Blocks Two blocks on inclined faces share a string over a pulley — who slides which way?
Physics · Simple Harmonic Motion SHM Explorer A spring-mass and pendulum oscillate while a sine curve and energy bars track them.
Physics · Kinematics 1D Motion & Kinematic Graphs Drive a particle along a line and watch its x–t, v–t and a–t graphs draw in sync.
Physics · Momentum and Collision Collision Lab Two carts collide on a track; momentum, energy and the centre of mass update live.
Physics · Gravitation Orbits & Kepler's Laws Launch a satellite and watch its orbit, equal-area sweeps and period obey Kepler.
Physics · Kinematics Projectile Motion Playground Fire a projectile and trace its parabola with range, height and flight time.
Physics · Rotational Motion Rolling Race Release a ring, disc and sphere down a ramp — and see who reaches the bottom first.
Physics · Work, Energy & Power Energy Track Send a ball over hills and through a loop while KE and PE trade off before your eyes.
Physics · Laws of Motion Newton's 2nd Law & Free-Body Diagram Push a block with forces and watch the free-body diagram and acceleration resolve.
Physics · Circular Motion Banking & Circular Motion Take a car around a flat or banked curve and find the fastest safe speed.
Physics · Properties of Matter Stress–Strain / Elasticity Stretch a wire and watch its stress–strain curve rise to the elastic limit.
Physics · Friction Inclined Plane with Friction Place a block on a ramp and see whether it slides — with every force resolved.
Physics · Rotational Motion Angular Momentum — Spinning Disc Change a spinning body's moment of inertia and watch its spin rate answer.
Physics · Rotational Motion Torque & Equilibrium Balance a beam by placing weights, then read off the support reactions.
Physics · Fluid Mechanics Viscosity & Terminal Velocity Drop a sphere into a viscous fluid and watch it settle to a steady terminal speed.
Physics · Fluid Mechanics Hydraulic Press Press a small piston and lift a big load — Pascal's law made tangible.
Physics · Fluid Mechanics Bernoulli — Pipe Flow Push fluid through a narrowing pipe — it speeds up and its pressure drops.
Physics · Gravitation Gravity & g-Variation Move a mass from a planet's core out into space and watch g and its weight change.
Physics · Work, Energy & Power Work by a Variable Force The work done by a force is the area under its force–position graph.
Chemistry
11 simulations
Chemistry · Solutions Raoult's Law — Vapour Pressure of Solutions Slide the composition and watch two volatile liquids build the total vapour pressure.
Chemistry · Solutions Colligative Properties & Osmosis Solvent crosses a membrane and raises a column until osmotic pressure balances the flow.
Chemistry · Study of Compounds — Hydrogen Chloride Fountain Experiment — Solubility of HCl Gas Squeeze in water, watch the pressure collapse and the atmosphere push up a red fountain.
Chemistry · Study of Compounds — Hydrogen Chloride Fountain Experiment — Solubility of HCl (Explainer) A narrated walkthrough — run it once for solubility, once with litmus for acidity.
Chemistry · Study of Compounds Study of Compounds — Gas Evolution & Confirmatory Tests Drag reagents together, heat them, and identify HCl, NH₃, HNO₃ and H₂SO₄ by the gas that comes off.
Chemistry · Electrochemistry Galvanic Cell — Electrode Potentials & EMF Pick two metals and watch electrons flow, ions migrate and the voltmeter settle.
Chemistry · Electrochemistry Nernst Equation — Concentration & Cell Potential Change ion concentrations and temperature and watch the cell voltage drift off E°.
Chemistry · Chemical Kinetics Reaction Order & Integrated Rate Laws Watch [A] fall for zero, first and second order — and how the half-lives change.
Chemistry · Chemical Kinetics Arrhenius & Collision Theory — Activation Energy Raise the temperature and watch the Boltzmann tail past the activation energy fatten.
Chemistry · Coordination Compounds Crystal Field Theory — d-Orbital Splitting Split the d-orbitals with a ligand field and watch spin, magnetism and colour follow.
Chemistry · Haloalkanes & Haloarenes SN1 vs SN2 — Nucleophilic Substitution Set the substrate, nucleophile and solvent and watch the winning mechanism reshape the energy profile.