Light Travels at 3 $\times$ 10⁸ M/s,and the Size of a Proton Is About 1

question 78

Multiple Choice

Light travels at 3 $\times$ 10⁸ m/s,and the size of a proton is about 1 fm.Calculate the order of magnitude for the time taken for light to pass across a proton.

• A)10^-7 s
• B)10^-8 s
• C)10^-22 s
• D)10^-23 s
• E)10²³ s

---

Definitions:

Temperament

The combination of mental, physical, and emotional traits of a person; natural predisposition, which is often evident from infancy.

Testosterone

The most important of the male sex hormones. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs in the fetus and the development of the male sex characteristics during puberty.

Assertive

Characterized by confidence and self-assurance in expressing opinions, desires, or boundaries without being aggressive.

Empathic

Having the ability to understand and share the feelings of another from their perspective.