Inertia Force of Elevator
Elevator and inertia Elevators are an excellent place to feel the inertia force. Consider the case of taking an elevator and trying to go up from the lower floor. When you press the button that goes … more
Radio Wave Communication
The basic structure of the antenna comes from a capacitor. An antenna is a device for sending and receiving electromagnetic waves. A typical dipole antenna has the form of a wire with both ends cut off. … more
Dipole Antenna
The basic structure of the antenna comes from a capacitor. An antenna is a device for sending and receiving electromagnetic waves. A typical dipole antenna has the form of a wire with both ends cut off. … more
Direct Current(DC) and Alternating Current(AC)
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 … more
Sound pitch and volume
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 … more
Stair Switch
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 … more
Chord, Just intonation, Equal temperament
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 … more
Standing Waves on a String
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 … more
Fourier Series 2
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. … more
Fourier Series
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. … more
Collision 2
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 … more