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Historically, such measurements could be made fairly accurately, compared to how accurately the length of the reference distance is known in Earth-based units. Ole Christensen Rømer used an astronomical measurement to make the first quantitative estimate of the speed of light in the year 1676.
Electronic waste (or e-waste) describes discarded electrical or electronic devices. It is also commonly known as waste electrical and electronic equipment (WEEE) or end-of-life (EOL) electronics. [1] Used electronics which are destined for refurbishment, reuse, resale, salvage recycling through material recovery, or disposal are also considered ...
Also called CR1/3N because it is 1 ⁄ 3 rd the height of an alkaline N cell, and a stack of three of them will form a battery with the same dimensions as an N cell, but with 9 V terminal voltage. Such 9 V batteries in a single package do exist but are rare and only usually found in specialist applications; they can be referred to as 3CR1/3N.
Other box irons had heated metal inserts instead of hot coals. From the 17th century, sadirons or sad irons (from Middle English "sad", meaning "solid", used in English through the 1800s [4]) began to be used. They were thick slabs of cast iron, triangular and with a handle, heated in a fire or on a stove. These were also called flat irons.
Makemake was discovered on March 31, 2005, by a team at the Palomar Observatory, led by Michael E. Brown, [8] and was announced to the public on July 29, 2005. The team had planned to delay announcing their discoveries of the bright objects Makemake and Eris until further observations and calculations were complete, but announced them both on July 29 when the discovery of another large object ...
A muscle back is the more traditional design and consists of a solid metal head, typically made of forged iron. The design of the club typically distributes the metal more evenly around the clubhead (though most designs still place more weight along the sole of the club), which makes the center of mass of the club higher and the moment of inertia (the clubhead's resistance to rotation) lower ...
A golf cart or golf buggy is a small vehicle designed originally to carry two golfers and their golf clubs around a golf course. The earliest known golf cart was an electric one, built in California around the year 1932 by an unnamed golfer who was physically unable to walk to all 18 holes on a golf course. [ 246 ]
The Electronic Registration Information Center (ERIC) is a nonprofit organization in the United States whose goal is to improve electoral integrity by helping states improve the accuracy of voter rolls, increase access to voter registration, reduce election costs, and increase efficiencies in elections. ERIC is operated and financed by state ...