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In AC electrical power systems, a synchroscope is a device that indicates the degree to which two systems ( generators or power networks) are synchronized with each other. [1] For two electrical systems to be synchronized, both systems must operate at the same frequency, and the phase angle between the systems must be zero (and two polyphase ...
Several common ethanol fuel mixtures are in use around the world. The use of pure hydrous or anhydrous ethanol in internal combustion engines (ICEs) is only possible if the engines are designed or modified for that purpose, and used only in automobiles, light-duty trucks and motorcycles. Anhydrous ethanol can be blended with gasoline (petrol ...
Wearable devices such as activity trackers are an example of the Internet of things, since "things" such as electronics, software, sensors, and connectivity are effectors that enable objects to exchange data (including data quality [4]) through the internet with a manufacturer, operator, and/or other connected devices, without requiring human intervention. Wearable technology offers a wide ...
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
Google uses various tax avoidancestrategies. On the list of largest technology companies by revenue, it pays the lowest taxes to the countries of origin of its revenues. Google between 2007 and 2010 saved $3.1 billion in taxes by shuttling non-U.S. profits through Irelandand the Netherlandsand then to Bermuda.
Sleep in animals refers to a behavioral and physiological state characterized by altered consciousness, reduced responsiveness to external stimuli, and homeostatic regulation observed in various animals. [citation needed] Sleep has been observed in mammals, birds, reptiles, amphibians, and some fish, [citation needed] and, in some form, in ...
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations ...
Apple Inc. has produced and sold headphones since 2001, available for standalone purchase and bundled with iPhone (until 2020) and iPod (until 2022) products. Apple's current product line consists of EarPods (wired earbuds available with a 3.5mm headphone or Lightning connector or USB-C ), AirPods and AirPods Pro (wireless Bluetooth earbuds), and AirPods Max (wireless Bluetooth over-ear ...