Energy & Green Tech
A newly published doctoral thesis at Karlstad University shows that organic solar cells are a promising technology, due to its flexibility and vast potential applications.
Nov 28, 2023
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10
Robotics
Running on the beach versus a paved road can change an athlete's stride, speed and stability. Alter the force of gravity, and that runner may break their personal record or sink into the ground. Researchers have to consider ...
Sep 26, 2023
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46
Engineering
Everything burns. Given the right environment, all matter can burn by adding oxygen, but finding the right mix and generating enough heat makes some materials combust more easily than others. Researchers interested in knowing ...
Jun 1, 2023
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32
Robotics
For proper operation, drones usually use accelerometers to determine the direction of gravity. In a new study published in Nature on October 19, 2022, a team of scientists from Delft University of Technology, the CNRS and ...
Oct 20, 2022
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126
Energy & Green Tech
With the rapid reduction in the costs of renewable energy generation, such as that of wind and solar power, there is a growing need for energy storage technologies to make sure that electricity supply and demand are balanced ...
May 30, 2022
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399
Engineering
In the beginning, all that Stephan Schlamminger wanted to do was to write down an equation that would help him obtain a more precise value for G, the gravitational constant that determines the strength of the attraction between ...
Feb 17, 2022
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252
Engineering
For astronauts to go on long missions to the moon or Mars, they need a refrigerator. But today's fridges aren't designed to work in zero gravity—or upside down if oriented that way when a spacecraft lands on another planet.
Apr 14, 2021
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8
Machine learning & AI
In his dissertation, mathematician Abel Stern managed to reconstruct the shape of a drum on a computer from hearing merely the lowest tones. He will obtain his Ph.D. from Radboud University on 30 March.
Mar 29, 2021
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7
Hi Tech & Innovation
Emergency responders and engineers in Britain said on Tuesday they have successfully tested "the world's first jet suit paramedic", which could transform how life-savers reach isolated casualty sites.
Sep 29, 2020
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98
Energy & Green Tech
Gravity has been the center of wonderment for physicists, mathematicians and thinkers of all kinds for centuries.
Gravitation is a natural phenomenon by which objects with mass attract one another. In everyday life, gravitation is most commonly thought of as the agency which lends weight to objects with mass. Gravitation compels dispersed matter to coalesce, thus accounting for the existence of the Earth, the Sun, and most of the macroscopic objects in the universe. It is responsible for keeping the Earth and the other planets in their orbits around the Sun; for keeping the Moon in its orbit around the Earth; for the formation of tides; for convection, by which fluid flow occurs under the influence of a temperature gradient and gravity; for heating the interiors of forming stars and planets to very high temperatures; and for various other phenomena observed on Earth. Modern physics describes gravitation using the general theory of relativity, in which gravitation is a consequence of the curvature of spacetime which governs the motion of inertial objects. The simpler Newton's law of universal gravitation provides an accurate approximation for most calculations.
The terms gravitation and gravity are mostly interchangeable in everyday use, but a distinction is made in scientific circles. "Gravitation" is a general term describing the phenomenon by which bodies with mass are attracted to one another, while "gravity" refers specifically to the net force exerted by the Earth on objects in its vicinity as well as by other factors, such as the Earth's rotation.
This text uses material from Wikipedia, licensed under CC BY-SA
