When It Is Struck by 240-Nm Photons,a Material Having a Work

question 21

Multiple Choice

When it is struck by 240-nm photons,a material having a work function of 2.60 eV emits electrons.What is the maximum kinetic energy of the emitted electrons? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• A)2.58 eV
• B)5.18 eV
• C)2.00 eV
• D)4.21 eV

Understand the principles of gas exchange in different environments.

Identify physiological adaptations of diving mammals.

Understand how respiratory health is influenced by external factors such as smoking.

Understand the definitions and values of different air volume terms (e.g., tidal volume, residual volume, vital capacity).

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Definitions:

Profit

The financial gain obtained when revenues exceed the costs associated with business operations or investments.

Heart

That which is vital; the center or core of a person or thing. Expressing one’s innermost thoughts and feelings is termed “speaking from the heart,” and it is the basis of credibility and trust.

Emotional Intelligence

The capacity to be aware of, control, and express one's emotions, and to handle interpersonal relationships judiciously and empathetically.

Collaboration

Working together with one or more people to achieve a common goal, often involving sharing knowledge, learning, and building consensus.