Coal-fired Poland turns toward the sun
A solar boom is helping Poland take a big step towards weaning itself off coal as a new homegrown photovoltaic technology is poised to be a game-changer in harnessing the power of the sun.
May 19, 2021
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Energy & Green Tech
A solar boom is helping Poland take a big step towards weaning itself off coal as a new homegrown photovoltaic technology is poised to be a game-changer in harnessing the power of the sun.
May 19, 2021
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9
Energy & Green Tech
A deceptively simple sensor system developed at the U.S. Department of Energy's Pacific Northwest National Laboratory can prevent dangerous conditions from developing in outdoor battery cabinets.
May 18, 2021
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Energy & Green Tech
Zinc-air batteries (ZABs) are among the most promising next-generation battery technologies due to their many advantageous characteristics. Most notably, these batteries have unique half-open structures, a significant theoretical ...
Engineering
Keeping turbines running efficiently during a hot Australian summer's day can be hard work. But a new technology is drawing on the cold night air to make it easier.
May 13, 2021
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Energy & Green Tech
Australian photovoltaics researchers have made a 'cool' discovery: Singlet fission and tandem solar cells—two innovative ways to generate solar power more efficiently—also help to lower operating temperatures and keep ...
May 10, 2021
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Consumer & Gadgets
Your Apple Watch is apparently going to get a lot smarter in the months ahead.
May 3, 2021
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Electronics & Semiconductors
Exploring extreme environments can put significant operational challenges on the engineering systems we depend upon to safely explore and at times operate within.
Apr 29, 2021
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Engineering
Scientists in China have developed a small, flexible device that can convert heat emitted from human skin to electrical power. In their research, presented April 29 in the journal Cell Reports Physical Science, the team showed ...
Apr 29, 2021
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Energy & Green Tech
Solar power accounts for about 2% of U.S. electricity, but it could become more widespread if it were cheaper to generate this electricity and make it readily available on cloudy days and at nighttime.
Apr 29, 2021
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186
Energy & Green Tech
The heat pumps we use to heat our homes and domestic water operate at temperatures of between 30 and 60 degrees, but many industrial processes require much higher temperatures—and some industries require an entirely different ...
Apr 28, 2021
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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