The tissue dose rate in a beam of 500 keV gmmas is 1 Gy/min. What is...
The tissue dose rate in a beam of 500 keV gmmas is 1 Gy/min. What is the photon flux in photons/cm^2/min?
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The tissue dose rate in a beam of 500 keV gmmas is 1 Gy/min.
What is...
please answer as much as you can, i will rate. 2. Circle the designator in front of the correct answer() from the list following each question or statenent. (o) A radioactive sample with Ti 10 hou...
please answer as much as you can, i will rate.
2. Circle the designator in front of the correct answer() from the list following each question or statenent. (o) A radioactive sample with Ti 10 hours earlier? (10 pointa 2h has an activity of I mCl sow. What wns ite activity i. 32.0 mCi ii. 10.0 mCI ii. 6.0 mCi iv. 2.0 mC v. 0.2 mC (b) The water in the primary loop of a typical PWR is used as...
2. A beam of 100 keV neutrons is sent through a tank of water (H20, p...
2. A beam of 100 keV neutrons is sent through a tank of water (H20, p = 1 g/cm3). The neutron scattering cross-sections of hydrogen and oxygen are os(H, 100 keV) = 12.5 b, os(0, 100 keV) = 3.6 b. (a) What are the macroscopic scattering cross-sections for this beam of neutrons from the hydrogen and oxygen? (b) The neutron beam has an initial intensity of 105 neutrons/second, after passing through 2.5 cm of water, what is the beam intensity...
A 1 Curie isotropic point source that emits one 400 keV photon per decay is located...
A 1 Curie isotropic point source that emits one 400 keV photon per decay is located at the center of a spherical tungsten shield with mass density 19.3 g/cm^3 and atomic mass 183.84 g/mol. with a radius of 2.5 cm. The microscopic cross section of the tungsten at this energy is 55 b. Determine the uncollideed scalar flux a distance of 30 cm away from the source. Negelect photon collisions outside the shield and treat it like a vacuum.
A beam of electrons with kinetic energy of 1 keV passes through a slit of width...
A beam of electrons with kinetic energy of 1 keV passes through a slit of width a = 1 micro-m. The electron beam is then detected on a phosphorescent scree loacted at a distance D = 1 m from the slit. What is the width W of the "image" of the electron beam?
Drug T Order: starting dose of 0.7 mcg/kg/min; titrate up by 0.5 mcg/kg/min increments to a...
Drug T Order: starting dose of 0.7 mcg/kg/min; titrate up by 0.5 mcg/kg/min increments to a maximum dose of 5 mcg/kg minute Supply: 50 mg of drug in 250 mL of D5W Patient's weight:219 lbs Starting dose: Starting dose: mcg/min mL/hr Titration dose Titration dose: increase the pump by mcg/min mL/hr Maximum dosemlr Maximum dosemcg/min Drug K is ordered for a patient to start at an infusion rate of 2 mcg/kg/min; increase by 1 mcgkg/min to desired effect up to...
The standard rate of IV infusion for an adult dose of dobutamine is 20 mcg/min for...
The standard rate of IV infusion for an adult dose of dobutamine is 20 mcg/min for every kilogram of body mass. For a patient weighing 209 pounds, what is the rate of dobutamine infusion?
2. Cirele the designator in front of the most correct answer from the list following each question or statement. (a) Classically, a particle of mass 1 u that has a kinetic energy of 0.5 MeV has what...
2. Cirele the designator in front of the most correct answer from the list following each question or statement. (a) Classically, a particle of mass 1 u that has a kinetic energy of 0.5 MeV has what momen- tum? [10 points i. 1.631 x 10-20 kg m-1 ii. 1.631 x10-10 kg m s-1 ii. 3.262 x 10-20 kg m -1 iv. 3.262 × 10-10 kg m s-1 . 1.00 kg m s-1 (b) What is the mean free path length...
QUESTION 1 1. You have a hemodialyzer with a blood flow rate of 500 ml/min and...
QUESTION 1 1. You have a hemodialyzer with a blood flow rate of 500 ml/min and a dialysate flow rate of 800 ml/min. The urea concentration in the blood leaving the patient is 175 mg/dl. The flow of blood and dialysate is countercurrent. If the urea clearance is 410 ml/min, what is the urea concentration in the blood returning to the patient?
The Heidelberger Ionenstrahl-Therapiezentrum (HIT) has a particle accelerator capable of reaching beam kinetic energies of 500...
The Heidelberger Ionenstrahl-Therapiezentrum (HIT) has a particle accelerator capable of reaching beam kinetic energies of 500 MeV per nucleon. Instead of using protons or alpha particles, Dr. X wants to investigate the effects of high LET radiation in a tissue irradiation experiment with a 12C (A=12, Z=6) ion beam with a kinetic energy of 6000 MeV. The carbon ion beam (stripped of electrons) will be impinging on a radially symmetric (e.g. cylindrical) tissue-equivalent target. Using the Bethe-Bloch equation, calculate the...
THIS IS AN ASTRONOMY QUESTION: Question 1: An observer uses an X-ray telescope with an effective area of 500 cm^2 to search for X-ray emission lines in the spectrum of an accreting neutron star. At t...
THIS IS AN ASTRONOMY QUESTION: Question 1: An observer uses an X-ray telescope with an effective area of 500 cm^2 to search for X-ray emission lines in the spectrum of an accreting neutron star. At the energy of the target line, 6.7 keV, the continuum (arising from accretion) contributes 1.2 × 10^−3 counts/s/cm2/keV. In a spectrum accumulated over a 1 ks observation, the observer measures a total of 162 counts from within a 0.2 keV range centred on the target...
please answer as much as you can, i will rate.
2. Circle the designator in front of the correct answer() from the list following each question or statenent. (o) A radioactive sample with Ti 10 hours earlier? (10 pointa 2h has an activity of I mCl sow. What wns ite activity i. 32.0 mCi ii. 10.0 mCI ii. 6.0 mCi iv. 2.0 mC v. 0.2 mC (b) The water in the primary loop of a typical PWR is used as...
2. A beam of 100 keV neutrons is sent through a tank of water (H20, p = 1 g/cm3). The neutron scattering cross-sections of hydrogen and oxygen are os(H, 100 keV) = 12.5 b, os(0, 100 keV) = 3.6 b. (a) What are the macroscopic scattering cross-sections for this beam of neutrons from the hydrogen and oxygen? (b) The neutron beam has an initial intensity of 105 neutrons/second, after passing through 2.5 cm of water, what is the beam intensity...
Drug T Order: starting dose of 0.7 mcg/kg/min; titrate up by 0.5 mcg/kg/min increments to a maximum dose of 5 mcg/kg minute Supply: 50 mg of drug in 250 mL of D5W Patient's weight:219 lbs Starting dose: Starting dose: mcg/min mL/hr Titration dose Titration dose: increase the pump by mcg/min mL/hr Maximum dosemlr Maximum dosemcg/min Drug K is ordered for a patient to start at an infusion rate of 2 mcg/kg/min; increase by 1 mcgkg/min to desired effect up to...
2. Cirele the designator in front of the most correct answer from the list following each question or statement. (a) Classically, a particle of mass 1 u that has a kinetic energy of 0.5 MeV has what momen- tum? [10 points i. 1.631 x 10-20 kg m-1 ii. 1.631 x10-10 kg m s-1 ii. 3.262 x 10-20 kg m -1 iv. 3.262 × 10-10 kg m s-1 . 1.00 kg m s-1 (b) What is the mean free path length...
QUESTION 1 1. You have a hemodialyzer with a blood flow rate of 500 ml/min and a dialysate flow rate of 800 ml/min. The urea concentration in the blood leaving the patient is 175 mg/dl. The flow of blood and dialysate is countercurrent. If the urea clearance is 410 ml/min, what is the urea concentration in the blood returning to the patient?
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