Cấu hình so le của etan ổn định hơn cấu hình che khuất.
Electrochemical processes in a lead-acid battery produce electric current.
Tìm hiểu khái niệm về màu sắc, con số, chữ cái và hình học qua các trò chơi
Every era and every culture has specific residential buildings.
HMS Dreadnought revolutionised battleship-building in the 20th century.
Radial engines are used primarily in aeroplanes and helicopters.
The first calendars and time-measuring instruments were already used by ancient Eastern civilisations.
The aircraft manufactured by the British de Haviland company was the world's first mass-produced commercial jetliner.
The marathon running event was instituted in commemoration of the run of a Greek soldier after the Battle of Marathon, fought between the Athenian and the...
The animation offers a summary of the history of aviation from the Middle Ages.
The Greek fleet owed their success to their good tactics and their fast and easily manoeuvrable ships.
More than one million people died in the WWII Nazi death camp located in present-day Poland.
This animation presents levels of biological organisation from the level of the individual organism to the level of cells.
Adrenaline, also known as epinephrine, is a hormone produced in our body in stressful situations and plays an important role in the fight-or-flight response.
It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.
Its architectural solutions and ornamentation rank this mosque among the masterpieces of Islamic art.
Edges, diagonals and faces of a cube can be identified by its vertices.
The Earth's continents have been in constant motion during the history of the planet.
Careful tooth brushing is an important part of oral hygiene.
Là axit yếu, không màu, chỉ tồn tại trong dung dịch.