Electricity is a property of matter that results from the presence or movement of electric charge. Together with magnetism, it constitutes the fundamental interaction known as electromagnetism. ... > more
A space elevator is a theoretical structure designed to transport material from a planet's surface into space. Many different types of space elevators have been proposed. They all share the goal of ... > more
Technology is a broad term dealing with the use and knowledge of humanity's tools and crafts. For scientists and engineers, technologies are: conceptual tools - as methods, methodologies, techniques; ... > more
In physics, nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus. It is accompanied by the release or absorption of energy depending on the masses of the ... > more
A battery electric vehicle (BEV) is an electric vehicle that utilises chemical energy that is stored in rechargeable battery packs. Electric vehicles use electric motors instead of, or in addition ... > more
A submarine is a specialized watercraft that can operate underwater. Most major navies use submarines. Submarines are also used for marine and freshwater science and for work at depths too great for ... > more
Newton's cradle or Newton's balls, named after Sir Isaac Newton is a device that demonstrates conservation of momentum and energy.
It is constructed from a series of pendulums (usually five in ... > more