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What is one sign that indicates a physical change? a) matter changes, but no new substance is formed b) a substance changes color when exposed to air. c) something catches fire and turns back d) temperature drops as two liquids are mixed together
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Biology, 22.06.2019 00:30
Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?
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Biology, 22.06.2019 09:00
Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs
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What is one sign that indicates a physical change? a) matter changes, but no new substance is forme...
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