Search results
Leap year. A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th day (or 13th month) is added to keep the calendar year synchronised with the astronomical year or seasonal year. [1]
t. e. In chemistry, pH ( / piːˈeɪtʃ / pee-AYCH ), also referred to as acidity or basicity, historically denotes " potential of hydrogen " (or "power of hydrogen"). [1] It is a logarithmic scale used to specify the acidity or basicity of aqueous solutions.
A URL is a specific type of Uniform Resource Identifier (URI), [2] [3] although many people use the two terms interchangeably. [4] [a] URLs occur most commonly to reference web pages ( HTTP / HTTPS) but are also used for file transfer ( FTP ), email ( mailto ), database access ( JDBC ), and many other applications.
t. e. The number π ( / paɪ /; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.
The metre is the length of the path travelled by light in vacuum during a time interval of 1 / 299 792 458 of a second. This definition fixed the speed of light in vacuum at exactly 299 792 458 metres per second [121] (≈ 300 000 km/s or ≈1.079 billion km/hour [123] ).
means that does not bound a finite area from to. means that the area under is infinite. means that the total area under is finite, and is equal to. Infinity can also be used to describe infinite series, as follows: means that the sum of the infinite series converges to some real value.
Queer is an umbrella term for people who are not heterosexual or are not cisgender. [1] [2] Originally meaning 'strange' or 'peculiar', queer came to be used pejoratively against LGBT people in the late 19th century. Beginning in the late 1980s, queer activists, such as the members of Queer Nation, began to reclaim the word as a deliberately ...
