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Questions: 1. The most common type of star in the universe is the main sequence star. The name comes from the fact that in a graph of a star’s brightness versus its colour, main sequence stars lie along a prominent diagonal band. What is this graph called? 2. The abundance of elements produced in a…
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Questions: 1. A German engineer built the first train powered by electricity in 1879. He also founded a company that is a major electrical engineering multinational corporation today, and his name has been adopted as the SI unit of __________ ___________. Name the engineer and fill in the blanks. 2. In April 1869, George Westinghouse,…
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Questions: 1. Name the German physicist who is widely credited with first studying the general theory of relativity in five dimensions, creating the precursors of some ideas that later appeared in string theory. 2. Name the mathematician who was awarded the Fields Medal in 1998 for explaining ‘monstrous moonshine’, a strange connection between the monster…
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Q: Twilight is the light visible above the horizon when the sun is below the horizon. It is civil twilight when the sun is 6º below the horizon; X twilight when 12º below; and astronomical twilight when 18º below. Name X. A: Nautical twilight Q: At astronomical twilight in the evening, Y becomes visible in…
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