Science & Math Simulations

Prepare hydrogen gas by reacting zinc with dilute hydrochloric acid. Collect by downward displacement of water.

Prepare oxygen gas using hydrogen peroxide and manganese dioxide catalyst. No heat required.

Prepare carbon dioxide gas by reacting calcium carbonate with dilute hydrochloric acid. Collect by upward displacement of air.

Prepare nitrogen gas by heating ammonium chloride with sodium nitrite. Collect over water.

Prepare oxygen gas by heating potassium chlorate with manganese dioxide catalyst. Collect over water.

Watch carbon share its 4 valence electrons with 4 hydrogen atoms, forming four covalent bonds and the methane molecule.

Prepare ammonia gas by heating ammonium chloride with calcium hydroxide. Collect by downward displacement of air.

Interactive modern periodic table with 118 elements. Click any element to view details including atomic number, mass, electronic configuration, and more.

See how white light splits into a rainbow spectrum when passing through a triangular prism.

Spin a color disc to see how all colors blend into white light — demonstrating that white light contains the full visible spectrum.

Explore reflection of light on concave and convex mirrors. See how images form using ray diagrams with three standard rays.

Interactive solar system simulation with realistic orbital speeds, planet sizes, and Saturn's rings. Click any planet for details.

Explore the geometry of a 3D hemisphere. Adjust the radius, then watch volume, curved surface area, base area, and total surface area update in real-time.

Explore the geometry of a 3D cylinder. Adjust radius and height, then watch volume, curved surface area, and total surface area update in real-time.

Visual proof of a² + b² = c² with an interactive right triangle. Adjust legs and watch the areas update in real-time.

Interactive derivation of πr² by slicing a circle into sectors and rearranging them into a rectangle.

Explore the geometry of a combined solid (two cones joined base-to-base). Adjust radius and heights, then watch total volume and surface area update in real-time.

Explore the geometry of a 3D sphere. Adjust the radius, then watch volume, surface area, diameter, and circumference update in real-time.

Explore the geometry of a 3D right circular cone. Adjust radius and height, then watch volume, surface area, and slant height update in real-time.

Explore the geometry of a 3D right triangular prism. Adjust base legs and prism height, then watch volume, surface area, and hypotenuse update in real-time.

Interactive vector addition using Triangle Law, Parallelogram Law, and Polygon Law. Drag vectors to see the resultant update in real-time.

Explore the geometry of a combined solid (hemisphere on cylinder). Adjust radius and height, then watch total volume and surface area update in real-time.

Explore the geometry of a 3D square pyramid. Adjust base width and height, then watch volume, surface area, and slant height update in real-time.

Interactive unit circle visualization. See sin, cos, and tan as coordinates on a circle. Drag the angle to explore trig functions.

Interactive sine and cosine wave visualization. Adjust amplitude, frequency, and phase shift to see how waves change in real-time.

Explore the geometry of a combined solid (square pyramid on square prism). Adjust base width and heights, then watch total volume and surface area update in real-time.

Explore the geometry of a combined solid (hemisphere on cone). Adjust radius and cone height, then watch total volume, surface area, and slant height update in real-time.

Explore the geometry of a combined solid (cone on cylinder). Adjust radius, cylinder height, and cone height, then watch total volume and surface area update in real-time.