Automotive
Almost 75 years ago, U.S. Air Force pilot Chuck Yeager became the first person to fly faster than the speed of sound. Engineers have been pushing the boundaries of ultrafast flight ever since, attaining speeds most of us ...
Apr 8, 2022
1
578
Energy & Green Tech
The intermittent supply of green electricity requires large-scale storage to keep our power grids stable. Since normal batteries do not scale very well, the idea of using flow batteries, which store electricity in a fluid ...
Mar 16, 2022
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760
Robotics
The word robot may conjure images of hard, metallic bodies that are invulnerable to attacks. In modern day-to-day life, however, robots are hardly needed for defending against enemy attacks. Instead, they are required to ...
Feb 8, 2022
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42
Robotics
Science fiction novelists couldn't have come up with a crazier plot: microrobots streaming through blood or through other body fluids that are driven by light, can carry drugs to cancer cells and drop off the medication on ...
Feb 2, 2022
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63
Energy & Green Tech
Rice bran oil can potentially replace the petroleum-based oils currently used for cooling and lubricating lathes and other cutting machinery, says a study.
Jan 19, 2022
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5
Energy & Green Tech
Industrial processes account for more than a fourth of Europe's primary energy consumption and produce a tremendous amount of heat. EU funded research is closing the circle with novel systems that recover waste heat and return ...
Nov 30, 2021
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12
Electronics & Semiconductors
Imperial College London researchers have improved an electronic sensor that can be used for fast detection of infectious diseases like COVID-19.
Nov 2, 2021
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143
Energy & Green Tech
Wind can be used as a renewable energy source that is clean, uncontaminated, and inexhaustible. Such characteristics have helped wind energy technologies to a key contributor to sustainable development in society, which is ...
Oct 11, 2021
0
20
Robotics
Underwater vehicles are typically designed for one cruise speed, and they're often inefficient at other speeds. The technology is rudimentary compared to the way fish swim well, fast or slow.
Aug 11, 2021
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841
Robotics
Would you let a tiny MANiAC travel around your nervous system to treat you with drugs? You may be inclined to say no, but in the future, "magnetically aligned nanorods in alginate capsules" (MANiACs) may be part of an advanced ...
Aug 10, 2021
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688
In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress, no matter how small. Fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids.
In common usage, "fluid" is often used as a synonym for "liquid", with no implication that gas could also be present. For example, "brake fluid" is hydraulic oil and will not perform its required function if there is gas in it. This colloquial usage of the term is also common in medicine and in nutrition ("take plenty of fluids").
Liquids form a free surface (that is, a surface not created by the container) while gases do not. The distinction between solids and fluid is not entirely obvious. The distinction is made by evaluating the viscosity of the substance. Silly Putty can be considered to behave like a solid or a fluid, depending on the time period over which it is observed. It is best described as a viscoelastic fluid. There are many examples of substances proving difficult to classify. A particularly interesting one is pitch, as demonstrated in the pitch drop experiment currently running at the University of Queensland.
This text uses material from Wikipedia, licensed under CC BY-SA
