I think frequency it sounds like the correct answer but I am not completely sure if I am correct
A. <span>I .................
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V = 8 * 10^2 km/h = 800km/h
S= 1,8* 10^3 km = 1800km
t = ?
v = S/t
t = S/v
t = 1800km/ 800km/h
t ≈ 2,25h (135min)
What that means is the atom is so radioactive that the nucleus is unstable.
