How Many Seconds Are in 48 Hours?

Direct Answer • Key Takeaway

“9,192,631,770 Periods of the Radiation Corresponding to the Transition Between Two Hyperfine Levels of Ground State of Cesium 133 Atom” Is How One Second Is Defined Today.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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