14-gram ovarian tumor is treated using a sodium phosphate solution in which the phosphorus atoms are the radioactive Phosphorus-32 isotope with a half-life of 14. 3 days and which decays via beta emission (RBE=1) with an energy of 1.71 MeV. Half of the sodium phosphate solution is absorbed by the tumor and deposits 9.0 J of energy into it. The other half of the solution is dispersed throughout the patient’s tissues, also depositing 9.0 J of energy into the 50.0 kg of body tissues. i. What is the dose (in gray and rem) that the tumor receives? ii. What is the dose (in milligray and rem) that the rest of the tissues receives?
14-gram ovarian tumor is treated using a sodium phosphate solution in which
the phosphorus atoms are the radioactive Phosphorus-32 isotope with a half-life
of 14. 3 days and which decays via beta emission (RBE=1) with an energy of 1.71
MeV. Half of the sodium phosphate solution is absorbed by the tumor and deposits
9.0 J of energy into it. The other half of the solution is dispersed throughout the
patient’s tissues, also depositing 9.0 J of energy into the 50.0 kg of body tissues.
i. What is the dose (in gray and rem) that the tumor receives?
ii. What is the dose (in milligray and rem) that the rest of the tissues receives?
B. Photoelectrons from a material with a binding energy of 2.71 eV are ejected by
420-nm photons. Once ejected, how long does it take these electrons to travel 2.50
cm to a detection device?
C. The heating element in an electric kettle is rated as 2.0 kW. If the water in the kettle
is at 100.0 °C, what volume of water will be converted into steam in one minute?
The specific latent heat of vaporization of the water is 2,257,000 J/kg and the
density of water is 1,000 kg/m3.
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