A Physicist Wishes to Measure the Exposure of a Beam

question 29

Multiple Choice

A physicist wishes to measure the exposure of a beam of gamma rays. The beam is passed through 2.00 × 10^-2 kg of dry air at STP. The beam produces positive ions in the air which have a total charge of 3.87 × 10^-6 C. What is the exposure (in roentgens) of the beam?

• A)7.74 × 10^-8 R
• B)1.94 × 10^-4 R
• C)3.25 × 10^-2 R
• D)0.750 R
• E)1.25 R

---

Definitions:

Federalists

Members of a political movement in the late 18th century United States that advocated for a strong national government and the ratification of the Constitution.

Anti-federalists

Individuals who opposed the ratification of the United States Constitution in 1787, fearing centralized government and advocating for stronger state sovereignty.

Declaration of Independence

A founding document of the United States, adopted on July 4, 1776, which declared the thirteen American colonies independent from British rule.

Guiding Principles

Fundamental norms, rules, or values that represent what is desirable and positive for a person, group, organization, or community, and help it to determine the rightfulness or wrongfulness of its actions.