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2 天前 · This is a list of cities in the United Kingdom that are officially designated such as of 12 November 2022. It lists those places that have been granted city status by letters patent or royal charter. There are currently a total of 76 such cities in the United Kingdom: 55 in England, eight in Scotland, seven in Wales, and six in Northern Ireland.
4 天前 · Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty. The term and the concept are used in diverse fields, from classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, and to the principles of information theory.
- S
- joules per kelvin (J⋅K−1)
- kg⋅m²⋅s−2⋅K−1
1 天前 · Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network)[1] including 1 billion people in more than 193 countries.[2][1][3] The official theme for 2024 is "Planet vs ...
15 小時前 · Ammonia is a colourless gas with a characteristically pungent smell.It is lighter than air, its density being 0.589 times that of air.It is easily liquefied due to the strong hydrogen bonding between molecules. Gaseous ammonia turns to a colourless liquid, which boils at −33.1 C (−27.58 F), and freezes to colourless crystals at −77.7 C (−107.86 F).
1 天前 · Diabetes mellitus, often known simply as diabetes, is a group of common endocrine diseases characterized by sustained high blood sugar levels. [10] [11] Diabetes is due to either the pancreas not producing enough insulin, or the cells of the body becoming unresponsive to the hormone's effects. [12] Classic symptoms include thirst, polyuria ...
1 天前 · Veganism is the practice of abstaining from the use of animal products—particularly in diet—and an associated philosophy that rejects the commodity status of animals.[c] A person who follows the diet or philosophy is known as a vegan. Distinctions may be made between several categories of veganism. Dietary vegans, also known as "strict ...
4 天前 · Phosphorus is a chemical element; it has symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. It has a concentration in the Earth's crust of about one gram per kilogram (compare copper at about ...
