The Attractive Force Between Protons and Neutrons in the Nucleus $\pi$

question 8

Multiple Choice

The attractive force between protons and neutrons in the nucleus is brought about by the exchange of a virtual pi-meson (m $\pi$ = 140 MeV/c2) .Estimate the longest time a virtual $\pi$ 0 can exist, in accordance with the uncertainty principle .(1 eV = 1.6 * 10-19 J.)

• A)2.4 * 10-24 s
• B)6.9 * 10-27 s
• C)3.3 * 10-18 s
• D)2.4 * 10-21 s
• E)1.6 * 10-19 s

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Definitions:

Canalization

A genetic concept explaining how genotype restrictions lead to predetermined phenotypic outcomes despite environmental variations.

Stunted Growth

A condition in which growth and development are significantly below the normal rates for age, often due to malnutrition or neglect.

Failure To Thrive

A medical and psychological condition typically noticed in infants and children, where they exhibit significantly slower physical development compared to peers, often due to malnutrition, emotional neglect, or underlying health issues.

Proportions

The relative sizes or ratios of parts to a whole or to one another within a whole, commonly used in mathematical, artistic, and design contexts.