Three Body Problem
x y Vx Vx * 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. * As the operation is … 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. In mathematics, this process … more
State of Water
By adjusting the temperature of the thermometer, you can observe the state of the water corresponding to the temperature. State of matter The material around us exists in three states (solid, liquid, gas) depending on temperature. Solids do not change … 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 perceive air. This makes … 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 earth is spherical, so … 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 of the least time … 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). This is the idea … 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 of light in dense … 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 passage of light varies … 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 Wireless control Wireless control ... 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 the Galton board, is … 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 base (OH-) react in … more