answer in kg

When 1.0 kg of coal is burned, about 3.0e7 J of energy is released. If the energy released per 23592U fission is 2.0e2 MeV, how many kilograms of coal must be burned to produce the same energy as 1.0 kg of 235nucleons 92protons U?

What is the activity N//t of the radioactive source?

A 2.0-kg tumor is being irradiated by a radioactive source. The tumor receives an absorbed dose of 12 Gy in a time of 750 s. Each disintegration of the radioactive source produces a particle that enters the tumor and delivers an energy of 0.35 MeV. What is the activity N//t of the radioactive source?

answer in J

A film badge worn by a radiologist indicates that she has received an absorbed dose of 2.3e-5 Gy. The mass of the radiologist is 67 kg. How much energy has she absorbed?

answer in roentgens

beam of rays passes through 4.0e-3 kg of dry air and generates 1.6e12 ions, each with a charge of +e. What is the exposure (in roentgens)?

answer in J

If each fission of a 235nucleons 92protonsU nucleus releases about 2.0e2 MeV of energy, determine the energy (in joules) released by the complete fissioning of 0.9 gram of 235nucleons 92protonsU.