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Rare collectible dreidels from Cochin are made from iron; they are black in colour decorated with silver markings, made by an intricate Bidriware style process. The Guinness World Record for Most Valuable Dreidel [37] was achieved by Estate Diamond Jewelry in November 2019 and was valued at $70,000 ($83,421 in current dollars, adjusted for ...
The boiling water trick. The boiling water trick is one of the more popular experiments featured on social media during cold weather. As experimenters throw steaming water, a white cloud is left ...
A laboratory tripod is a three-legged platform used to support flasks and beakers. Tripods are usually made of stainless steel or aluminium and made light-weight for efficient portability within the lab. Often a wire gauze is placed on top of the tripod to provide a flat base for glassware.
Laboratory glassware may be made from several types of glass, each with different capabilities and used for different purposes. Borosilicate glass is a type of transparent glass that is composed of boron oxide and silica, its main feature is a low coefficient of thermal expansion making it more resistant to thermal shock than most other glasses ...
1021 – Ibn al-Haytham (Alhacen) pioneers the experimental scientific method and experimental physics in his Book of Optics, where he devises the first scientific experiments on optics, including the first use of the camera obscura to prove that light travels in straight lines and the first experimental proof that visual perception is caused ...
Several laboratory experiments are capable of producing relatively pure gas as an end product, and it may be useful to demonstrate the chemical identity of that gas. Burning splints or glowing splints can be used to identify whether a gas is flammable , whether it is oxidising , or whether it is chemically inert .
In chemistry, a condenser is laboratory apparatus used to condense vapors – that is, turn them into liquids – by cooling them down. [1] Condensers are routinely used in laboratory operations such as distillation, reflux, and extraction. In distillation, a mixture is heated until the more volatile components boil off, the vapors are ...
The Maccabee Bar, a Hanukkah-themed pop-up bar, is returning to New York for its third year.. Starting Monday, Dec. 23, through Tuesday, Jan. 4, 2025, patrons can get lit at the pop-up located at ...