If parts per million was expressed as time it would be equal to 1 second every 11.57 ppm day(s).
What is parts per million?
Parts per million or ppm means out of a million and it is usually written in power of ten as follows;
1 ppm = 1/10⁶
86,400 s = 1 day
1/86,400 = 1.157 x 10⁻⁵ day/s
= 11.57 x 10⁻⁶ day/s
= 11.57 ppm day/s
Thus, if parts per million was expressed as time it would be equal to 1 second every 11.57 ppm day(s).
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