time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)
Answer from: Quest
70.30
step-by-step explanation:
Answer from: Quest
my guess would be b and d, but i didn’t actually get out the pen and paper. lol
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