What is the approximate numerical value of Planck’s constant?

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1. What is the approximate numerical value of Planck’s constant?

6.6 × 10⁻³⁸ joule-seconds

6.6 × 10⁻³⁴ joule-seconds

6.7 × 10⁻³⁹ joule-seconds

7.9 × 10⁻³⁵ joule-seconds

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Planck’s constant, a fundamental constant linking a photon’s energy to its frequency, has an approximate value of 6.6 × 10⁻³⁴ joule-seconds.