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14 ore fa · 6 + 2 H 2 SO 4 → 2 BaSO 4 + 2 H 2 O + XeO 4. To prevent decomposition, the xenon tetroxide thus formed is quickly cooled into a pale-yellow solid. It explodes above −35.9 °C into xenon and oxygen gas, but is otherwise stable. A number of xenon oxyfluorides are known, including XeOF 2, XeOF 4, XeO 2 F 2, and XeO 3 F 2. XeOF 2 is formed by ...
14 ore fa · Lorenz cipher machine, used in World War II to encrypt communications of the German High Command Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior ...
14 ore fa · Harley-Davidson. / 43.04611°N 87.96000°W / 43.04611; -87.96000. Harley-Davidson, Inc. ( H-D, or simply Harley) is an American motorcycle manufacturer headquartered in Milwaukee, Wisconsin, United States. Founded in 1903, it is one of two major American motorcycle manufacturers to survive the Great Depression along with its historical ...
14 ore fa · Randy Johnson. Randall David Johnson (born September 10, 1963), nicknamed " the Big Unit ", is an American former professional baseball pitcher who played 22 seasons in Major League Baseball (1988–2009) for six teams, primarily the Seattle Mariners and Arizona Diamondbacks . At 6 feet 10 inches (2.08 metres) tall, Johnson was the tallest ...
