Physics / Astronomy
Galaxy (Barnes-Hut N-body)
A spiral galaxy star by star: gravity alone winds up the arms.
Available for Windows
Makarov Physics Suite
200 interactive modules span mechanics, waves, optics, electromagnetism, quantum phenomena, fluids and thermodynamics. Work with physical objects, inspect detailed 3D apparatus and connect the motion to live measurements.
200 modules · Page 1 / 10
Physics / Astronomy
N-body problem
Gravitating many-body systems: from the Solar System to choreographies.
Physics / Astronomy / Engineering
Rocket motion
Variable mass and the Tsiolkovsky equation, staging and gravity.
Physics
Coupled oscillators
Normal modes, beats and waves in a chain of 2–8 masses coupled by springs.
Physics
3D oscillator systems
Mass-spring cubes, membranes and chains, plus sixteen exact modes of a fixed square membrane. Strike a point, excite a mode or drive a resonance.
Physics
Ball on a spinning arm
A heavy ball on a rope from a rotating arm: it lags the arm and swings outward by inertia; cut the motor and the orbit spirals back in.
Physics / Astronomy
Speed of light from Io
Roemer 1676: Io's eclipses arrive late when Earth is far from Jupiter, and the residuals of the fit measure the speed of light.
Physics
Conical pendulum
A bob swept round a cone: tension leans in, its horizontal part is the centripetal force, and only one spin rate holds the angle steady.
Physics / Earth
Tower and earthquake
Shake a building at its own frequency, then tune a roof damper and watch the sway die.
Physics
Prism and spectrum
White light through a prism: dispersion, rainbow, total internal reflection.
Physics / Astronomy
Retrograde motion
Ptolemy vs Copernicus: the same planets, two frames. Pin the Earth and epicycles appear by themselves - Mars walks backwards once per synodic period.
Some modules belong to more than one Suite. Shared experiments have one description here.