The Work Function of a Particular Metal Is $4.20 \times 10 ^ { - 19 } \mathrm {~J}$

question 37

Multiple Choice

The work function of a particular metal is $4.20 \times 10 ^ { - 19 } \mathrm {~J}$ What is the photoelectric cutoff (threshold) wavelength for this metal? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ? s)

• A)473 nm
• B)308 nm
• C)393 nm
• D)554 nm

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Definitions:

Sapir-Whorf Hypothesis

The theory that the structure of a language affects its speakers' world view or cognition, and thus people's perceptions are relative to their spoken language.

Hypothesis

A tentative explanation of the relationships among certain phenomena.

Sound Pitch

The auditory perception of the frequency of a sound wave, which determines the highness or lowness of a tone.

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Various fields of study within the discipline of linguistics, including phonetics, phonology, morphology, syntax, semantics, pragmatics, and others, focusing on different aspects of language.