What Is the Cutoff (Threshold)frequency for a Metal Surface That $10^{15}$

question 44

Multiple Choice

What is the cutoff (threshold) frequency for a metal surface that has a work function of 5.42 eV? (1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

• A)1.31 × \(10^{15}\) Hz
• B)2.01 × \(10^{15}\) Hz
• C)3.01 × \(10^{15}\) Hz
• D)5.02 × \(10^{15}\) Hz
• E)6.04 × \(10^{15}\)
• Hz

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Vertebrates that can live both in water (using gills) and on land (using lungs), including frogs, salamanders, and newts.

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The layer of cells lining the airways of the lungs, involved in lung defense mechanisms.