ตระกร้าสินค้าว่างเปล่า
One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that exists only in aqueous solution.
A compound formed as white smoke during the combustion of phosphorus.
The German triplane was perhaps the best known plane in World War I.
Schooners, first built in the Netherlands in the 17th century, were mainly used as merchant ships.
From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.
A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of oars, used by many armies.
Metals forming hexagonal metallic lattices are rigid and difficult to machine.
The face-centred cubic metal lattice allows the closest fit of metal atoms.
Farmhouses in the Middle Ages were simple, single-storey structures built from earth, mud and wood.
กล้องโทรทรรศน์อวกาศฮับเบิลโคจรอยู่รอบนอกชั้นบรรยากาศเพื่อลดผลกระทบจากชั้นบรรยากาศของโลก
ทวีปของเลื่อนมีรูปแบบของการเคลื่อนที่อย่างต่อเนื่องตลอดประวัติศาสตร์ของโลก
HMS Dreadnought revolutionised battleship-building in the 20th century.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.
Ziggurats were typical terraced step pyramids used as temples in ancient Mesopotamia.
An exercise about the regular hexahedron built from unit cubes to help deepen your knowledge of cubes.
In alkaline batteries electric current is generated by electrochemical reactions
