Satellites orbiting the Earth can be used for civilian or military purposes.
The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one side.
The conic section is a plane curve that is created when a right circular cone is intersected by a plane.
This animation demonstrates instruments used to examine atmospheric phenomena.
A mobile, nuclear-capable ballistic missile developed at the end of the Cold War.
Tidal power stations utilise the daily fluctuation of the water level for producing electricity.
An exercise about the regular hexahedron built from unit cubes to help deepen your knowledge of cubes.
Thermal power stations convert energy released during the combustion of fossil fuels or renewable resources into electricity.
A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.
A sphere is the set of points which are all within the same distance from a given point in space.
The Crow are Native Americans who inhabited the Yellowstone River valley.
امپراتوری آزتک یک کشور استبدادی، نظامی گرا بود که تحت فرمانروای حاكم قرار داشت۔
Submarines submerge and surface by changing the average density of the hull.
The length of the metal frameworks of bridges change when the temperature changes.
The United States entered World War II after the devastating attack by the Japanese navy.
امپراتور امپراطوری پهناور دور و شرقی ارباب زندگی و مرگ بود۔
Geothermal power stations convert energy of hot, high-pressure water found in deeper layers of the Earth into electricity.
An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.
Machinery that pumps crude oil to the surface