Chemistry, 10.01.2021 14:00 emilyrobles
Emily learns that ancient astronomers, such as Ptolemy, created a model of the solar system based only on what they could see with their eyes. Describe Ptolemy's model of the solar system and how he came to his conclusions. Then describe Galileo's model of the solar system. Explain how Galileo proved that his model was correct and that Ptolemy’s was not correct.
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All chemicals, even safe chemicals, such as sodium chloride( table salt), are toxic if exposure is high enough. (true or false)
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The activation energy for a(n) is quite large and usually takes extra energy from the environment, it is normally not a natural spontaneous process. combustion reaction endothermic reaction exothermic reaction catalyzed reaction
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Chemistry, 23.06.2019 14:30
The first supersonic flight was in 1947. it was just above the speed of sound. which altitude would you expect captain yeager to have used for his flight
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Emily learns that ancient astronomers, such as Ptolemy, created a model of the solar system based on...
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