Answer:
A chain reaction will be sustained in a sub-critical mass.
Explanation:
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Magnetism.
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Answer:
a.proton, proton
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A = (v - u) / t
a = acceleration
v = final velocity
u = initial velocity
t = time
45 = (v - 300) / 10
45 × 10 = v - 300
450 + 300 = v
v = 750 m/s
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P.S. Let me know if you need an explanation
