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Science Bowl Question

📅 MIT Science Bowl 2022🎓 HS🔄 Round 13#️⃣ Question 23 TOSS UP📝 Multiple Choice

Which of the following best describes the process that creates the plateau observed in Type II-P supernovae?

W) The hydrogen envelope is ionized then slowly recombines
X) The radioactive decay of cobalt-56 reionizes the hydrogen envelope
Y) Neutrinos produced during the supernova ionizes the hydrogen envelope
Z) The recollapse of the hydrogen envelope into the star releases energy
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