Which of the following manifests the harmonious bringing forth of technology? iPhones
Nuclear power plant
Watermill
Hydropower plant

Explanation is in the file

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iPhones

Explanation:

Hope this helps:)

beta decay is the answer

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.