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Twice a number is equal to negative four. Which equation could be used to find the number? 2n = 4 2n = -4n 2n - 4 2n = -4
asked
May 17, 2018
Mathematics
high-school
2
answers
3
votes
208k
views
How many photons are in a laser pulse of 0.363J at 657 nm?
asked
Jan 18, 2017
Physics
high-school
1
answer
3
votes
135k
views
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