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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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