Heat Capacity
Heat capacity ‘Heat capacity’ is the amount of heat to raise the temperature of an object by 1℃. The heat capacity of an object is the specific heat of the object multiplied by the object’s mass. Since the heat capacity … more
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Specific Heat
Specific Heat When you apply the same amount of heat to metal and water of the same mass, the metal temperature change is greater than that of water. This is because the amount of heat required to change the temperature … more
Epeirogenic movement
Epeirogenic movement(Epeirogeny) It is a phenomenon that the crust is slowly rising or sinking over a wide range. The crust rests on a dense mantle and balances forces. Therefore, when the high part of the crust is cut down due … more
Picking up Stones 2
Pick up the stones each other. The person who picks up the last one wins the game. However, you can not pick up more than twice the amount of stones your opponent has taken. Pick-up puzzle and Fibonacci sequence For … more
Picking up Stones 1
Pick up the stones each other. The person who picks up the last one is lost the game. You can not pick up more than three at a time. The computer thinks like this: Whenever I pick up 1, 2, … more
RGB Color Combination
Three primary colors of light Red, green, and blue are called the three primary colors of light. You can create any color by adjusting the light of these three colors appropriately. red + green = yellow red + blue = … more
Electrolysis of Water
Electrolysis of Water When electrolysis is performed using a dilute aqueous NaOH solution as an electrolyte, hydrogen gas is generated at the cathode (-), and oxygen gas is generated at the anode (+). The reaction equation is as follows. (＋)pole: … more
Graph of Charle’s Law
Charle’s Law Charle’s Law In 1787, French scientist Charle (1746-1823) revealed that increasing the temperature of a gas by 1℃ at constant pressure increases the volume of the gas by 1/273 of the volume at 0℃. This is called Charle’s … more
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 the atomic model represent … 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 to plating material such … 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 the moon to be … more