Related topics: space · nasa · launch vehicle

Researchers harness the sun to produce hydrogen gas from water

A team of chemistry researchers at the University of North Carolina at Chapel Hill has developed a unique approach to harnessing the sun's energy to produce hydrogen gas, a potential clean energy source, from water, according ...

A microalgae–material hybrid promotes carbon neutrality

Microalgae, including cyanobacteria and green algae, represent the most important biological systems for producing biomass and high-value products. It is estimated that microalgae can fix about 90 billion tons of carbon dioxide ...

Toward continuous reservoir monitoring from space

Most satellites are placed in orbit on 5-to-10-year missions to accomplish many tasks. One of the many functions of the satellites carrying a Moderate Resolution Imaging Spectroradiometer (MODIS) is to monitor water reservoirs ...

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Engine

An engine is a mechanical device that produces some form of output from a given input. An engine whose purpose is to produce kinetic energy output from a fuel source is called a prime mover; alternatively, a motor is a device which produces kinetic energy from other forms of energy (such as electricity, a flow of hydraulic fluid or compressed air). A motor car (automobile) has a starter motor and motors to drive pumps (fuel, power steering, etc) – but the power plant that propels the car is called an engine. The term 'motor' was originally used to distinguish the new internal combustion engine -powered vehicles from earlier vehicles powered by a steam engine (as in steam roller and motor roller).

Military engines included siege engines, large catapults, trebuchets and battering rams.

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