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Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.
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Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?
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Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?
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Indoor air pollution has increased as improvements have been made in . A) heating and air-conditioni...
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