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Satellite image of Berlin, with the Wall's location marked in yellow West and East Berlin borders overlaying a current road map The Berlin Wall (German: Berliner Mauer, pronounced [bɛʁˌliːnɐ ˈmaʊɐ] ) was a guarded concrete barrier that encircled West Berlin of the Federal Republic of Germany (FRG; West Germany) from 1961 to 1989, separating it from East Berlin and the German Democratic ...
- 13 August 1961
- Wall
- 155 km (96.3 mi)
- 9 November 1989 – 1994
Isopropyl alcohol ( IUPAC name propan-2-ol and also called isopropanol or 2-propanol) is a colorless, flammable organic compound with a pungent alcoholic odor. [9] Isopropyl alcohol, an organic polar molecule, is miscible in water, ethanol, and chloroform, demonstrating its ability to dissolve a wide range of substances including ethyl ...
- 82.6 °C (180.7 °F; 355.8 K)
- 60.096 g/mol
- −89 °C (−128 °F; 184 K)
- Miscible with water
The Great Wall of China ( traditional Chinese: 萬里長城; simplified Chinese: 万里长城; pinyin: Wànlǐ Chángchéng, literally "ten thousand li long wall") is a series of fortifications that were built across the historical northern borders of ancient Chinese states and Imperial China as protection against various nomadic groups from ...
0 (zero) is a number representing an empty quantity. Adding 0 to any number leaves that number unchanged. In mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and complex numbers, as well as other algebraic structures. Multiplying any number by 0 has the result 0, and consequently, division ...
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.The Sun is an ordinary main sequence star that maintains a balanced equilibrium by the fusion of hydrogen into helium at its core, releasing this energy from its outer ...
In mammals, the vulva ( pl.: vulvas or vulvae) consists of the external female genitalia. The human vulva includes the mons pubis, labia majora, labia minora, clitoris, vulval vestibule, urinary meatus, vaginal opening, hymen, and Bartholin's and Skene's vestibular glands. The vulva includes the entrance to the vagina, which leads to the uterus ...
Elon Reeve Musk (/ ˈ iː l ɒ n / EE-lon; born June 28, 1971) is a businessman and investor.He is the founder, chairman, CEO, and CTO of SpaceX; angel investor, CEO, product architect, and former chairman of Tesla, Inc.; owner, executive chairman, and CTO of X Corp.; founder of the Boring Company and xAI; co-founder of Neuralink and OpenAI; and president of the Musk Foundation.
