搜尋結果
The 38th annual Forbes list of the world's billionaires found a record 2,781 billionaires with a total net wealth of $14.2 trillion. This is an increase of 141 members and $2 trillion from 2023, which held the previous record for the highest net worth gain on the list, surpassing the $900 billion record set in 2022.
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe.[e][13] It is bordered by Italy to the south, France to the west, Germany to the north and Austria and Liechtenstein to the east. Switzerland is geographically divided among the Swiss Plateau, the Alps and the Jura; the Alps occupy the ...
Apple Inc. (formerly Apple Computer, Inc.) is an American multinational corporation and technology company headquartered in Cupertino, California, in Silicon Valley.It designs, develops, and sells consumer electronics, computer software, and online services.Devices include the iPhone, iPad, Mac, Apple Watch, Vision Pro, and Apple TV; operating systems include iOS, iPadOS, and macOS; and ...
This list comprises the largest companies currently in the United States by revenue as of 2023, according to the Fortune 500 tally of companies and Forbes. The Fortune 500 list of companies includes only publicly traded companies, also including tax inversion companies. There are also corporations having foundation in the United States, such ...
Probability theory. In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is. The parameter is the mean or expectation of the distribution (and also its median and mode ), while ...
The Chernobyl disaster [a] began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at seven—the maximum severity ...
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. [9] It is mainly used as a eugeroic ( wakefulness promoter) or as a mild cognitive enhancer to increase alertness and attentional performance. [10] [11] Caffeine acts by blocking binding of adenosine to the adenosine A 1 receptor, which enhances release of the ...
