Three Body Problem
x y Vx Vy * The mass and gravitational constant of the celestial body were each assumed to be ‘1’. * You can edit the position and speed of each celestial body while not running. * … more
Ideal Gas Law Calculator
The ideal gas equation is a formula that expresses the law of the relationship between pressure, volume, number, and temperature of ideal gases. With this simple equation, you can calculate the remaining variables you don’t know. … more
Gas in Various Condition
This simulation supports multitouch. Nature of gas Since the gas can not be seen or touched, a little imagination is needed to understand the ‘nature of the gas.’ In most everyday life, people often do not … more
Day and Night, Seasons, White Night, Polar Night
* If you are asked to access your location, please allow it. * Your personal data is not stored on the server. * For iOS devices, please allow location access as follows. Day and night The … more
Principle of least time (Fermat’s principle)
Why does a slightly curved path take less time than a straight path? Ants can move faster on flat stones than on rugged grass. Therefore, travel time is the shortest on slightly curved paths. This principle … more
Matter Wave and de Broglie’s Atomic Model
Light has both particle and waves properties at the same time. Likewise, de Broglie (France, 1892 – 1987) thought that such things as electrons that had so far been considered particles might possess wave nature (1932). … more
Light Refraction
You can drag the path of light. Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another. This occurs because of the slow speed … more
Heart Rate Counter
Pulse Blood vessels are elastic. When the heart contracts, the blood vessels dilate; when the heart relaxes, the vessels constrict. Hemoglobin in the blood absorbs particular light. Therefore, when light is applied to human tissue, the … more
Micro:bit Maqueen robot code collection
Evasive maneuver (using distance sensor) Marqueen avoids walls or obstacles it encounters during its progress(< 20 cm). Source code https://makecode.microbit.org/#pub:75200-46487-20442-48437 Line tracker Line tracker – source code https://makecode.microbit.org/#pub:25457-13297-31811-64902 Black barrier Black barrier – source code https://makecode.microbit.org/#pub:28206-29997-02800-36929 ... more
Galton Board (Binomial Distribution)
Galton Board The Galton board is a tool for visualizing the principles by which the binomial distribution is created. Early Galton boards were made with wooden poles and beads that rolled down. Francis Galton, who created … more
Neutralization Reaction Model
Neutralization reaction The reaction of an acid and a base to form water is called a neutralization reaction. When an acid and a base react, hydrogen ions from the acid (H+) and hydroxide ions from the … more
Micro:bit Wireless DS18B20 (waterproof) Thermometer
You can use a Micro:bit as MBL by connecting a DS18B20 temperature sensor. If no sensor is connected, the Micro:bit built-in thermometer value is output. Thermal equilibrium experiment between hot and cold water The sensor connects … more