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Physics, 22.06.2019 23:50
What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.
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Definition: this is the weighted average of all of the isotopes of an element.
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Physics, 23.06.2019 12:00
When thorium (90 protons) ejects a beta particle, the resulting nucleus has question 18 options: 87 protons. 88 protons. 89 protons. 90 protons. none of the above
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