The Spacing of the Atoms of a Crystal Is $159 \mathrm { pm }$

question 67

Multiple Choice

The spacing of the atoms of a crystal is $159 \mathrm { pm }$ . A monoenergetic beam of neutrons directed normally at the surface of the crystal undergoes first order diffraction at an angle of $58 ^ { \circ }$ from the normal. What is the energy of each of the neutrons? ( $m _ { \text {neutron } } = 1.675 \times 10 ^ { - 27 } \mathrm {~kg} , 1 \mathrm { eV } = 1.6 \times$ $\left. 10 ^ { - 19 } \mathrm {~J} , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

• A) \(0.050 \mathrm { eV }\)
• B) \(0.039 \mathrm { eV }\)
• C) \(0.056 \mathrm { eV }\)
• D) \(0.061 \mathrm { eV }\)
• E) \(0.045 \mathrm { eV }\)

Analyze the role of attention in memory processing and its impact on learning and recall.

Explain strategies for improving memory retention and recall, such as chunking and rehearsal techniques.

Illustrate the limitations and capacities of different memory storage systems.

Examine misconceptions about memory capacity and functionality.

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Definitions:

Feudalism

A social and economic system in Europe during the Middle Ages characterized by a hierarchy of lords and vassals who control land use and provide protection in return for service or labor.

Postsecondary Education

Education that takes place after completing high school, including programs at colleges, universities, vocational schools, and technical institutions.

Family Income

The total monetary earnings received by all members of a household, encompassing wages, salaries, benefits, and other income sources.

Participant Observation

A qualitative research method in which the researcher closely observes a group or community while participating in its activities to better understand its dynamics.