5 天之前 · Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically …

2025年9月28日 · Rock Hudson, American actor noted for his good looks and movie roles during the 1950s and ’60s, including Magnificent Obsession, Giant, and Pillow Talk, and for the TV …

The Beatles’ success suggested that it was possible to enjoy the commercial, mass-cultural power of rock and roll while remaining an artist. The immediate consequence was folk rock. Folk …

First, that rock is so broad a musical category that in practice people organize their tastes around more focused genre labels: the young Presley was a rockabilly, the Beatles a pop group, …

Rock remains the most democratic of mass media—the only one in which voices from the margins of society can still be heard out loud. Yet, at the beginning of the 21st century, rock and the …

2025年8月19日 · Rock - Electrical Properties: The electrical nature of a material is characterized by its conductivity (or, inversely, its resistivity) and its dielectric constant, and coefficients that …

2025年9月10日 · Sedimentary rock, rock formed at or near Earth’s surface by the accumulation and lithification of sediment or by the precipitation from solution at normal surface temperatures.

Rock - 80s, 90s, Pop: The music industry was rescued from its economic crisis by the development in the 1980s of a new technology, digital recording. Vinyl records were replaced …

Rock's origins lie in rock and roll, a new form of American popular music in the 1950s that was personified early on by Elvis Presley. Other successful rock singers, musicians, and groups …

2025年8月19日 · Lava, magma (molten rock) emerging as a liquid onto Earth’s surface. The term ‘lava’ is also used for the solidified rock formed by the cooling of a molten lava flow.