When It Is Struck By $240 - \mathrm { nm }$

question 9

Multiple Choice

When it is struck by $240 - \mathrm { nm }$ photons, a material having a work function of $2.60 \mathrm { eV }$ emits electrons. What is the maximum kinetic energy of the emitted electrons? ( $c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times$ $10 ^{- 34} \mathrm {~J} \cdot \mathrm { s } , 1 \mathrm { eV } = 1.60 \times 10 ^{- 19} \mathrm {~J}$ )

• A) \(4.21 \mathrm { eV }\)
• B) \(2.00 \mathrm { eV }\)
• C) \(2.58 \mathrm { eV }\)
• D) \(5.18 \mathrm { eV }\)

Understand the benefits and advantages of online surveys in research.

Identify and explain the potential negative impacts of self-help literature.

Compare and contrast different theoretical perspectives in studying complex social issues.

Recognize ethical considerations and requirements in conducting social research.

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