Dragon Curve
A dragon curve is a piece of paper folded several times in the same direction as the picture and then bent vertically. This curve does not intersect even though it may touch. As the number of folds increases, it becomes … more
Hilbert Curve
A Hilbert curve is a continuous fractal space-filling curve first described by the German mathematician David Hilbert in 1891. Fractal’s self-similarity Fractal curves retain their original shape even if they are greatly enlarged. Most fractal curves produce the same transformation … more
Sierpinski Curve
Sierpiński curves are a recursively defined sequence of continuous closed plane fractal curves discovered by Wacław Sierpiński. Fractal’s self-similarity Fractal curves retain their original shape even if they are greatly enlarged. Most fractal curves produce the same transformation over and … more
Multiple Reflections
What is an image? Our eyes are designed to sense where the light came from. Even if the light didn’t actually originate there, if our eyes feel that way, our eyes say there’s an image there. When two mirrors face … more
Graph of Saturated Vapor 2
Water vapor in the air Liquid water can evaporate and turn into water vapor in the air. Conversely, water vapor in the air may turn back into the water. Some are very dry, with no moisture at all, such as … more
Convection
Convection When you boil water in the kettle, even if you heat only the bottom, the whole water becomes evenly hot. This is because water transfers heat while moving directly. In this way, liquid or gaseous substances can transfer heat … more
Epicycloid
Epicycloid refers to the trajectory drawn by a vertex on a small circle when a small circle is rolled outside a large circle. The radius of a large circle is denoted by R, the radius of a small circle is … more
Trigonometric functions
Definition of Trigonometric Functions In the right triangle, The longest side of the right triangle ‘c’ is the hypotenuse, ‘a’ is the base and ‘b’ is the height. You can assume that the angle between a and c is θ. … more
A Spaceship without Deceleration Engine
The inertia of the rocket Since there is no friction in outer space, stopping a rocket’s engine in motion does not stop it immediately. When the rocket’s engine is stopped, the rocket continues to move forward according to the law … more
Magnetic Induction
Magnetic Induction When the magnet is placed close to the clip, the clip sticks. And when the magnet is attached to the refrigerator, it does not fall. Also, when two magnets are brought close together, they push or pull each … more
Robotic vacuum cleaner
Goals of coding The room is filled with dirty dust. You must order the robot vacuum cleaner to clean the room. Combine the blocks to make the room clean. Not all blocks may be used.
Ant Nanny’s Larva Collecting
Goals of coding Baby larvae are scattered all over the place. We have to order the nanny ants to collect the larvae. Combine the blocks to make the nanny ant collect the larvae.