Direct Current, DC In direct current (DC), current flows in only one direction of a conductor. For example, since a battery’s terminals always maintain a constant pole, current flows in only one direction in an electrical circuit. Most of the … more
Height and loudness of the sound When we often say that a sound is ‘low’ or ‘high,’ we are referring to the height of the sound. The height of the sound is completely different from the loudness of the sound. … more
What if only one switch was installed on the stairs? Suppose there is only one light switch at the top of the stairs. What if You trying to descend the stairs presses a switch to descend the stairs, and then … more
This simulation is Works with Edge, FireFox, Chrome, Safari, Opera. does not works with Internet Explorer, Opera Mini. Due to the nature of the program, there may be some beats even in consonant sounds. Chord The sound of two or … more
This simulation is works with Edge, FireFox, Chrome, Safari, Opera. does not work withInternet Explorer, Opera Mini. String instrument Since string instruments are tied on both sides of the string, the string’s end becomes the vibration’s knot. When the string … more
Fourier series The Fourier series is an infinite series that expresses a periodic function that repeats a certain part as the sum of simple trigonometric functions. A simple trigonometric function consists of a smooth surface wave. If you keep adding … more
Fourier series The Fourier series is an infinite series that expresses a periodic function that repeats a certain part as the sum of simple trigonometric functions. A simple trigonometric function consists of a smooth surface wave. If you keep adding … more
This experiment is, You can experiment with heavy golf balls and light ping pong balls. Put a ping pong ball on top of the golf ball and drop it as it is. The golf ball hits the floor first. As … more
The ductility and malleability of metal When a force is applied to a metal crystal, the metal atom layer is pushed, and the atomic arrangement changes. But at this time, the free electrons move and maintain the bond between the … more
You can create various string art works by utilizing the computer’s fast computing power.
Parabolic motion Let’s think about the motion of throwing an object horizontally. There is no horizontal force when there is no air resistance, so there is no change in speed. This time, let’s consider a dropping. If the initial velocity … more
