Le Chatelier's Principle

Le Chatelier’s Principle

Pressure and chemical equilibrium transfer According to Le Châtelier, if the pressure is increased, the equilibrium position will move to reduce the pressure. The system can reduce the pressure by reacting in such a way as … more

LCD Display

LCD Display

Color and Eye Recognition Visible light has various colors. Light has a different color depending on the wavelength (or frequency). So, how do people perceive color? Cone cells in the eye’s retina recognize color. There are … more

Electric Potential

Electric Potential 3

What is the voltage value of the voltmeter? Voltage distribution in series connection When two or more resistors are connected in series, the sum of the resistors’ voltages becomes the total voltage. Therefore, the resistors divide … more

Ohm's Law

Ohm’s Law

Ohm’s Law When you connect the light bulb and the battery with a wire, the bulb lights up. This is because free electrons with negative charges (-) move along the wire, and this flow of charges … more

Electric Potential

Electric Potential 2

Battery and Load In an electrical circuit, the battery maintains a voltage difference to allow current to flow through the circuit. In an electric circuit, the place where energy is consumed is called a load. Generally, … more

Electric Potential

Electric Potential

Battery and Load In an electrical circuit, the battery maintains a voltage difference to allow current to flow through the circuit. In an electric circuit, the place where energy is consumed is called a load. Generally, … more

충돌

Collision

Collision of two balls of different mass 1. What happens if you throw a light ball towards a heavy ball? Just like a basketball ball bounces on the surface of large earth, the light ball bounces. … more

Archimedes Buoyancy

Buoyancy: Archimedes and the Crown

Why is the submerged volume important to understand buoyancy? It is so famous that the 3rd-century Greek philosopher Archimedes shouted “Eureka!” and ran out of the bathhouse naked. (What did Archimedes find out? – Quotations from … more

Ionic Bond

Ionic Bond

Formation and energy of the ionic bonds Metal atoms have strong properties to lose electrons and become cations. On the contrary, non-metallic atoms have strong properties to obtain electrons and become anions. As these two particles … more

Rutherford Scattering and Size of Nucleus

Rutherford Scattering and Size of Nucleus

Discovery of nuclear At the beginning of the 20th century, there was little known about the structure of atoms except that they contained electrons. At that time, the atom was known as a pudding model containing … more

Temperature and Reaction Rate

Temperature and Reaction Rate

Heat and molecular motion Every object is made up of atoms or molecules that are small particles that the eye can not see. These particles are constantly moved or oscillated themselves. This is called molecular motion. … more

Pascals Principle

Pascal’s Principle

Pascal’s Principle Pascal’s principle is as follows. “Suppose a closed tube filled with uncompressed fluid. Then, the pressure of this tube’s inside is the same everywhere.” For example, If you press any part of the tube … more