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Quiz bowl tests players in a variety of academic subjects including literature, science, history, and fine arts. [23] Additionally, some quiz bowl events may feature small amounts of popular culture content like sports, popular music, and other non-academic general knowledge subjects, although their inclusion is generally kept to a minimum. [24 ...
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Tests are more expensive to grade because of this, typically $25–30 per test compared to $2–5, not including the cost of developing the test, typically different every year for every state. Tests are more difficult to grade because they are typically graded against a handful with no more than one or two example papers at each scoring level.
The United States is the world's second-largest producer of energy. It produces 16% of the world's energy, about three-fourths as much as China. [4] Since 2019, the country has been a net exporter of energy. In 2023, 102.8 quads were produced and net exports were 7.6% of production. [18]
When a photon interacts with an atomic nucleus, electron-positron pairs can be generated in case the energy of the photon matches the required threshold energy, which is the combined electron-positron rest energy of 1.02 MeV. However, if the photon energy is even higher, then the exceeding energy is converted into kinetic energy of the particles.
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The word energy derives from the Ancient Greek: ἐνέργεια, romanized: energeia, lit. 'activity, operation', [4] which possibly appears for the first time in the work of Aristotle in the 4th century BC. In contrast to the modern definition, energeia was a qualitative philosophical concept, broad enough to include ideas such as happiness ...