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Pitch produced from petroleum may be called bitumen or asphalt, while plant-derived pitch, a resin, is known as rosin in its solid form. Tar is sometimes used interchangeably with pitch, but generally refers to a more liquid substance derived from coal production, including coal tar , or from plants, as in pine tar .
Cheat sheets were historically used by students without an instructor or teacher's knowledge to cheat on a test or exam. [1] In the context of higher education or vocational training, where rote memorization is not as important, students may be permitted (or even encouraged) to develop and consult their cheat sheets during exams.
However, the most important in carbon fiber production is mesophase pitch due to the ability to melt spin anisotropic mesophase pitch without filament breakage. The mesophase pitch forms a thermotropic crystal, which allows the pitch to become organized and form linear chains without the use of tension. Mesophase pitch is made by polymerizing ...
That dozen cost $1.70 more — a good 40% higher — than it did just four months ago. In November, egg prices shot up by 8.2% nationwide, logging one of the highest monthly spikes in the past two ...
A 19-year-old San Diego State University student named Steele Idelson was among dozens of people wounded in the tragic New Orleans truck attack.. As law enforcement officials investigate hundreds ...
The flu shot is estimated to have prevented 9.8 million illnesses, 4.8 million medical visits, 120,000 hospitalizations and 7,900 deaths last year. “I think the best time is now” for a flu ...
The oral exam (also oral test or viva voce; Rigorosum in German-speaking nations) is a practice in many schools and disciplines in which an examiner poses questions to the student in spoken form. The student has to answer the question in such a way as to demonstrate sufficient knowledge of the subject to pass the exam.
Uraninite crystals from Topsham, Maine (size: 2.7 × 2.4 × 1.4 cm) Uraninite is a major ore of uranium. Some of the highest-grade uranium ores in the world were found in the Shinkolobwe mine in the Democratic Republic of the Congo (the initial source for the Manhattan Project ) and in the Athabasca Basin in northern Saskatchewan , Canada.
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