Interactive simulations
Each simulation runs a real, tested model with its equations and assumptions explained on the page.
Gravity & Orbital Motion
Explore Newtonian gravity and circular-orbit mechanics interactively — adjust central body mass, orbiting body mass and orbital radius and see the real gravitational force, orbital velocity and orbital period recompute live.
Projectile Motion
Explore ground-to-ground projectile motion interactively — adjust launch speed, launch angle and surface gravity and see the real trajectory, range, max height and time of flight recompute live.
pH & Acid-Base
Explore the logarithmic pH scale and acid-base neutralisation interactively — adjust solution pH, acid concentration, acid volume and base concentration and see the real pH, pOH, hydroxide concentration and required neutralisation volume recompute live.
DNA Inheritance
Explore Mendelian inheritance interactively with a real monohybrid Punnett square — choose each parent's alleles and see the offspring genotype and phenotype ratios recompute live.
Neural Network Playground
PlusExplore a real feedforward neural network interactively — adjust inputs, weights, bias and activation function and see the classification decision boundary recompute live.
Gradient Descent
PlusExplore gradient descent optimisation interactively on a real quadratic loss landscape — adjust the starting point, learning rate and step count and watch the descent path converge or diverge live.
Waves & Interference
Explore wave frequency, wavelength and interference interactively — adjust two coherent sources' amplitude and phase difference and see the real superposed waveform and interference classification recompute live.
Electric Circuits
Explore Ohm's law and series/parallel resistor circuits interactively — adjust supply voltage, resistor values and topology and see the real solved current, voltage and power recompute live.
Light & Refraction
Explore the law of reflection, Snell's law and total internal reflection interactively — adjust refractive indices and incidence angle and see the real reflected and refracted ray angles recompute live.
Atom Builder
Build atoms and ions interactively — adjust proton, neutron and electron counts and see the real element, isotope, mass number and ion classification recompute live, using real IUPAC periodic-table data.