Which method is used to determine the dose delivered by a specific amount of absorbed ergs?

To determine the dose delivered by a specific amount of absorbed ergs, the correct method involves dividing the energy absorbed, measured in ergs, by the mass of the tissue, measured in grams. This principle comes from the definition of radiation dose, which is expressed as energy absorbed per unit mass.

In radiological terms, when we talk about absorbed dose, it is commonly measured in units such as rads or grays, where one rad is equal to the absorption of 100 ergs of energy per gram of tissue. Therefore, by dividing the total energy (in ergs) by the mass of the tissue (in grams), you find the absorbed dose in terms of a standard unit. This formula reflects how radiation dose is calculated and is crucial for understanding radiation safety and dosage levels in medical imaging and treatment.

The other methods provided do not correctly relate the absorbed energy to the mass of the tissue or do not follow the established definitions of dose, thus making them inappropriate for calculating the radiation dose accurately.