If 3 gm of tissue absorb 30 ergs of x-ray energy, what is the dose?

To calculate the dose in Rads, you can use the relationship between energy absorbed, mass of tissue, and dose. The dose is defined as the energy absorbed per unit mass of tissue. Specifically, 1 Rad is equivalent to the absorption of 100 ergs of energy per gram of tissue.

In this scenario, you have 30 ergs of energy absorbed by 3 grams of tissue. To find the dose in Rads, you first need to determine how many ergs are absorbed per gram:

1. Calculate the energy absorbed per gram of tissue:

[

\text{Energy absorbed per gram} = \frac{30 \text{ ergs}}{3 \text{ gm}} = 10 \text{ ergs/gm}

]

2. To convert this to Rads, you would then determine how many Rads correspond to this energy per gram. Since 1 Rad is equal to 100 ergs per gram, you can set up the following conversion:

[

\text{Dose in Rads} = \frac{10 \text{ ergs/gm}}{100 \text{ ergs/gm/Rad}} = 0.1 \text{ Rad}