A 55-Kg Person Exposed to Thorium-234 Receives 7

question 43

Multiple Choice

A 55-kg person exposed to thorium-234 receives 7.5 × 10⁴ β particles, each with an energy of 1.6 × 10^-14 J. How many rads does the person receive?

• A) 2.1 × 10^-19 rads
• B) 1.2 × 10^-17 rads
• C) 2.2 × 10^-9 rads
• D) 1.2 × 10^-9 rads
• E) None of these choices is correct.

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Definitions:

Gamete

A mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote.

Dizygotic Twins

Often referred to as fraternal twins, these are siblings born at the same time but developed from two separate eggs fertilized by two different sperm cells.

Zygotes

The initial cell that forms when a sperm cell fertilizes an egg cell, marking the start of human development.

Ovum

The female reproductive cell or gamete in animals, also referred to as an egg cell, that can develop into a new individual following fertilization.