A Proton Is Projected at a Stationary ${ } _ { 88 } ^ { 226 }$

question 72

Multiple Choice

A proton is projected at a stationary ${ } _ { 88 } ^ { 226 }$ Ra aluminum target. The proton momentarily comes to a halt at a distance from the center of an aluminum nucleus, equal to twice the nuclear radius. Assume that the nucleus retains its spherical shape and that the nuclear force on the proton is negligible. The initial kinetic energy of the proton, in $\mathrm { MeV }$ , is closest to:

• A) \(5.8 \mathrm { MeV }\)
• B) \(2.9 \mathrm { MeV }\)
• C) \(8.7 \mathrm { MeV }\)
• D) \(13 \mathrm { MeV }\)
• E) \(17 \mathrm { MeV }\)

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Definitions:

Significant Results

Statistical outcomes that demonstrate a meaningful difference or relationship, indicating that findings are unlikely due to chance.

One-Tailed Tests

Statistical tests that determine if there is a significant difference in a specific direction between two groups.

Nominal Scale

The simplest form of measurement in which data are categorized based on qualitative attributes or names without a numerical or ordered value.

Independent Variables

Variables that are manipulated or controlled in an experiment to test their effect on dependent variables.