Scientists develop low-temperature resisting aqueous zinc-based batteries
Aqueous zinc-based batteries (ZBBs) are widely used for portable and grid-scale applications due to their high safety, low cost and high energy density.
Aug 31, 2020
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Energy & Green Tech
Aqueous zinc-based batteries (ZBBs) are widely used for portable and grid-scale applications due to their high safety, low cost and high energy density.
Aug 31, 2020
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7
Robotics
During the current coronavirus pandemic, one of the riskiest parts of a health care worker's job is assessing people who have symptoms of COVID-19. Researchers from MIT and Brigham and Women's Hospital hope to reduce that ...
Aug 31, 2020
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Energy & Green Tech
Scientists from NUST MISIS have presented an innovative autonomous power source: a compact atomic battery that can last up to 20 years. Due to the original 3-D structure of the beta-voltaic element, its dimensions have decreased ...
Aug 21, 2020
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Energy & Green Tech
Wind and solar produced a record 10 percent of global electricity in the first half of 2020 as the world's coal plant fleet ran at less than half its capacity, analysis published Thursday showed.
Aug 13, 2020
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Consumer & Gadgets
The difficulty many people have getting tested for SARS-CoV-2 and delays in receiving test results make early warning of possible COVID-19 infections all the more important, and data from wearable health and fitness devices ...
Aug 10, 2020
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Automotive
Honda is recalling over 1.6 million minivans and SUVs in the U.S. to fix problems that include faulty backup camera displays, malfunctioning dashboard displays and sliding doors that don't latch properly.
Aug 4, 2020
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Energy & Green Tech
Anyone who's lived or worked in old buildings knows that their heating and cooling systems can't compare to the efficiency, insulation and consistency of those in new buildings. But the quirks of old buildings' climate control ...
Jul 29, 2020
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Robotics
A Ford plant in Michigan has gone to the dogs.
Electronics & Semiconductors
Lithium (Li) batteries, or lithium metal batteries, use metallic lithium as an anode. Over the past few decades, rechargeable Li batteries have been used to power a wide variety of electronic devices, including toys, portable ...
Electronics & Semiconductors
Electrical control of the magnetism of novel two-dimensional ferromagnetic semiconductors could enable the development of new types of spintronic devices—electronic devices that leverage the intrinsic magnetic properties ...
In physics, temperature is a physical property of a system that underlies the common notions of hot and cold; something that feels hotter generally has the higher temperature. Temperature is one of the principal parameters of thermodynamics. If no heat flow occurs between two objects, the objects have the same temperature; otherwise heat flows from the hotter object to the colder object. This is the content of the zeroth law of thermodynamics. On the microscopic scale, temperature can be defined as the average energy in each degree of freedom in the particles in a system. Because temperature is a statistical property, a system must contain a few particles for the question as to its temperature to make any sense. For a solid, this energy is found in the vibrations of its atoms about their equilibrium positions. In an ideal monatomic gas, energy is found in the translational motions of the particles; with molecular gases, vibrational and rotational motions also provide thermodynamic degrees of freedom.
Temperature is measured with thermometers that may be calibrated to a variety of temperature scales. In most of the world (except for Belize, Myanmar, Liberia and the United States), the Celsius scale is used for most temperature measuring purposes. The entire scientific world (these countries included) measures temperature using the Celsius scale and thermodynamic temperature using the Kelvin scale, which is just the Celsius scale shifted downwards so that 0 K= −273.15 °C, or absolute zero. Many engineering fields in the U.S., notably high-tech and US federal specifications (civil and military), also use the kelvin and degrees Celsius scales. Other engineering fields in the U.S. also rely upon the Rankine scale (a shifted Fahrenheit scale) when working in thermodynamic-related disciplines such as combustion.
This text uses material from Wikipedia, licensed under CC BY-SA