This animation demonstrates how electric steam irons work.
Competing with each other in the 19th and 20th centuries, the world´s most powerful nations made great efforts to develop effective firearms.
Hình ảnh này mô tả việc sử dụng công nghệ hiện đại trong nông nghiệp.
The wearer of the armour found at the archaeological dig of the Issyk Kurgan in Kazakhstan was named the 'Golden man'.
The most important types of local winds are the sea-land breeze, the mountain-valley breeze as well as the downslope winds.
The tower situated in the capital city of the Kazakh Republic symbolises the tree of life holding a golden egg.
A medieval glider constructed by Abbas Ibn Firnas.
The ingenius water pump designed by Al-Jazari is a great example of the creativity of Medieval Arab engineers.
The medieval Arab inventor, Hassan Al Rammah designed the world's first operating torpedo.
Các alkanes là các hydrocacbon bão hoà và được xếp thành một chuỗi đồng đẳng.
Mạch máu trong mang cá hấp thụ oxy và giải phóng carbon dioxit.
Các đàn quạ gáy xám phương Tây thường được tìm thấy trong các thành phố. Konrad Lorenz đã phân tích hành vi xã hội phức tạp của những con vật này.
Change of light conditions in different seasons. Calculating height using shadows.
The mummified body of a man who probably lived in the Chalcolithic period, was found in one of the glaciers of the Alps.
An orthopaedic disease of the foot, in which the longitudinal arch of the foot, formed by the tarsal bones, collapses.
Các axit amin cấu thành nên protein được bao quanh bởi những liên kết peptit.
Cây xanh có khả năng chuyển đổi các chất vô cơ (cacbon dioxit và nước) thành đường hữu cơ.
The poisonous bite of the Chilean recluse spider poses a serious threat to human health.
The animation helps to develop space perception and navigation in space using space coordinates.
By varying the position of the light source, you can examine the shades projected onto the planes of the coordinate system.
The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
Slavic warriors were greatly respected throughout Europe in the Middle Ages.