Energy Band of Metal
Energy band and band gap of atom According to Niels Bohr’s atomic model, electrons subordinate to an atomic nucleus do not have continuous energy. Electrons can only have sparsely defined energies. This is why lines in … more
Electric Plating
Electric Plating Electroplating is a technique of depositing a thin film of another metal on the surface of a metal. (-) The electrode is connected to the object to be plated, (+) The electrode is connected … more
Why does the moon rise 50 minutes later each day?
The reason why the moon rises 50 minutes late every day While the Earth rotates once a day, the Moon moves to the east little by little. So it takes 50 minutes to 24 hours for … more
Digital Sampling
Digital sampling All sounds in nature are analog signals. Analog information holds information from all consecutive times. Since it is not possible to record all the values at all times, usually only the values at regular … more
Chemical Cell (Voltaic Cell, Daniel Cell)
Electricity production before Volta Before chemical cells, such as dry cells, there was only one thing we knew as a way to produce electricity. That is rubbing amber, glass, or metal. Voltaic Cell Alessandro Volta (1745-1827) … more
Constant Velocity
Constant motion Constant velocity motion refers to motion with constant velocity. When a force is applied to an object, the object’s velocity changes, so the sum of all the forces applied to the object in uniform … more
Binary Counting
Binary Binary is a method of representing numbers using only two numbers, 0 and 1. In the case of the decimal system, rounding occurs when 9 is added to 1. In the binary system, adding 1 … more
Avogadro’s Law
Avogadro’s Law The Italian scientist Avogadro (1776-1856) introduced the molecules’ concept to explain gases’ reactions. According to his theory, the volume of any gas at the same temperature and pressure is proportional to the molecules’ number. … more
Bohr’s Atomic Model
The discovery process of the atom Democritus (Ancient Greece) – Predict the presence of an atom Dalton (UK, 1800) – Applied atomic chemistry Krux (Britain, late 19th century) – Invented a cathode ray tube to explain … more
Addition Polymerization
Addition Polymerization It is a reaction that forms a polymer compound while a double bond of a monomer forms a new single bond. When the monomers are bonded, no other small molecules are produced other than … more