Wrinkles in living organisms

Wrinkles in living organisms

Respiratory organ To maintain life, we absorb oxygen from the air. And we export carbon dioxide from the body. Human respiratory organs include the nose, organs, bronchi and lungs. Each bronchus in the lung continues to … more

Potential energy ↔ Kinetic energy ↔ Elastic energy

Conservation of Mechanical Energy

Potential energy The potential energy of an object is the energy stored in an object or system. Denoted as Ep. Generally speaking, potential energy refers to potential energy caused by gravity and is proportional to an … more

Potential energy by gravity

Potential energy due to gravity

Potential energy due to gravity Lifting heavy objects increases the potential energy of the object. The amount of work done when lifting an object of mass m by height h can be obtained as (Potential energy … more

Stratum Making

Stratum Making

About this simulation, When you press the button, you can see the corresponding strata. Combining the layer, you can create a variety of stratum. This simulation is presented as a mathematical model. Actual strata may be … more

Camera

Camera

Focus adjustment of the camera The eye focuses by adjusting the thickness of the lens. On the other hand, the camera focuses by adjusting the position of the lens. Focusing The light started from the object … more

Minimal force required for the lever

Minimal force required for the lever

Lever A lever is a tool that transmits force using a rod. With a lever, you can work with it having little force. The length of the lever can adjust the minimum force required to move … more

'Work' in science

‘Work’ in science

‘Work’ in science ‘Work’ in science and ‘work’ in everyday life is a little different. In science, ‘work’ is to apply a force to an object and move it in the force’s direction. In the following … more

Phase of the Moon

Phase of the Moon 2

It is only the sun that shines by itself in the solar system. Earth and moon do not emit light themselves. The earth and the moon only reflect the light of the sun. Since the earth … more

DC Motor Simulation

DC Motor

Motor An electric motor is a device that converts electrical energy into mechanical energy by utilizing the force received by a conductor through which a current flows in a magnetic field. Electric motors are used in … more

호모폴라 전동기

Homopolar Motor

Assuming that the current flowing in the wire is in the X-direction, the magnetic field is in the Y direction. Then, what direction is the electromagnetic force? ‘Homopolar motor’ refers to a motor operated by using … more

DNA 전기영동

DNA electrophoresis

This simulation assumes that the loading dye is 50bp and the marker is 50bp. (‘bp’ is a unit showing the number of base pairs of DNA.) Electrophoresis Electrophoresis is a chemical phenomenon in which an electric … more

Coriolis Effect

Coriolis Effect

Coriolis effect The French mathematician Coriolis first explained that the direction of fluid movement on the Earth’s surface is slightly warped. You can observe this effect in all spinning places like Earth. The Coriolis effect causes … more