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
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.
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.
How to play Select two cards. The selected card turns red. If you want to exchange the selected card, press the [Switch] button. If you think all the cards are in order, press the [Flip All] button to confirm. Try … more
Discovery of nuclei At the beginning of the 20th century, little was known about atoms’ structure, except that atoms contain electrons. At the time, the atom was thought to be as a model of pudding containing raisins. According to this … more
Brownian movement Botanist Robert Brown, while observing pollen on the water’s surface, He noticed that the pollen was constantly moving in random directions. At that time (1827), Brown believed that these movements were driven by special powers as a living … more
Polygonal Exterior Angle Imagine drawing a polygon with a pencil. While drawing a straight line with a pencil, We change the direction at the vertex. The size of the angle changing direction at the vertex becomes ‘exterior angle.’ If you … more
Direction of the Lorentz force Conductors in which current flows in a magnetic field are forced to move. The direction of this force is perpendicular to the current and the magnetic field, respectively. More precisely, we can find out below. … more
hygrometer It is a simple device that allows you to determine the humidity by measuring the difference in how much water evaporates. Compared to a simple structure, humidity can be measured relatively accurately. Before electronic hygrometers became popular, psychrometers were … more
The energy level of the atom Atoms are made up of an atomic nucleus and electrons that revolve around the nucleus. In Bohr’s atomic model, electrons can change their position by receiving energy (mainly light energy). But what’s unique is … more
Three elements of force When a force acts on an object, the object’s motion varies depending on the Three elements of force. That is the magnitude, direction, and point of action. Therefore, when displaying a force, you must indicate the … more
How to find out the circumference of a circle Let’s draw a regular polygon (inscribed polygon and circumscribed polygon) surrounding a circle. The perimeter of an inscribed polygon is less than the perimeter of the circle, and the perimeter of … more