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5 天前 · Sulfuric acid ( American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling ), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula H2SO4. It is a colorless, odorless, and viscous liquid that is miscible with water. [6]
1 天前 · Hokkaido ( Japanese: 北海道, Hepburn: Hokkaidō, pronounced [hokkaꜜidoː] ⓘ, lit. 'Northern Sea Circuit ') is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. [2] . The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel .
1 天前 · Characteristics. Physical. A copper disc (99.95% pure) made by continuous casting; etched to reveal crystallites. Copper just above its melting point keeps its pink luster color when enough light outshines the orange incandescence color.
1 天前 · Cnidaria ( / nɪˈdɛəriə, naɪ -/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
22 小時前 · The Himalayas, or Himalaya ( / ˌhɪməˈleɪ.ə, hɪˈmɑːləjə / HIM-ə-LAY-ə, hih-MAH-lə-yə) [b] is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the Earth 's highest peaks, including the highest, Mount Everest.
1 天前 · Physics is the natural science of matter, involving the study of matter,[a] its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force.[2] Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves.[b][3][4][5] A ...
1 天前 · Linux ( / ˈlɪnʊks / LIN-uuks) [11] is a family of open-source Unix-like operating systems based on the Linux kernel, [12] an operating system kernel first released on September 17, 1991, by Linus Torvalds.
