An Energy of 13

question 45

Multiple Choice

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?

• A) 60 nm
• B) 80 nm
• C) 70 nm
• D) 90 nm
• E) 40 nm

Recognize the importance of vocal qualities in delivering a presentation.

Understand environmental factors that affect presentations.

Grasp the strategy for concluding presentations effectively.

Appreciate the cultural and contextual sensitivities in public speaking and presentation delivery.

---

Definitions:

Chi-square Test

A statistical test used to determine if there is a significant difference between observed and expected frequencies in one or more categories.

Nominal Variables

Variables that represent categories with no inherent order or ranking among them.

Chi-square Test of Independence

A statistical test used to determine if there is a significant association between two categorical variables.

Test Statistic

A standardized value used in statistical hypothesis testing to decide whether to reject the null hypothesis.