Calculate the absorbed dose received by a 150 g tumour irradiated with 12 J of gamma-ray energy.Hint: Don't forget the units!

The absorbed dose (D) is defined as the amount of energy absorbed per unit mass. It is measured in Gray (Gy), where 1 Gy = 1 Joule/kilogram.

Given:

• Mass (m) = 150 g = 0.15 kg (since 1 kg = 1000 g)
• Energy (E) = 12 J

We can use the formula for absorbed dose:

D = E/m

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