The activity of 14C14C in a 70 -kg-kg human body is estimated to be 3.7 kBqkBq . What is this activity in microcuries?

Q: Calculate the surface area of a nucleus (assuming it to be a perfect sphere) (where, A=mass number…

A: The surface area of a nucleus.given,mass number=Aand ro=1.2×10-15 m

Q: What is the half-life, t½, (in hr) when the concentration was 100 mg/L?

A: The concentration is decreasing at rate of 10mg/L/hr .

Q: A batch of I-125 seeds is ordered so that the activity will be 0.48 mCi/seed on the day of the…

A: activity (A) = 0.48 mCi t = 5 days half life of I-125 = 60 days

Q: How X-ras work?

A: Answer:-   Solution:- X-Ray or X-Radiation is a highly penetrating radiation form from high-energy…

Q: A sample of silver contains 5.00 micrograms of Ag-105.  Determine the activity of the sample in…

A:

Q: Estimate to the two significant digits the number of nucleons per cubic femtometer (fm^3) in…

A: Let's consider a typical nucleus with three nucleons. The radius of the typical nucleus is given by…

Q: The half-life of americium-241 is 457 years. What is the activity in curies of a 0.010g of sample of…

A: Half life of americium 241  t1/2 = 457 years Mass of sample m = 0.010 g Molar mass of americium -241…

Q: Why are gamma rays not deflected in a magnetic field?

A: Given: gamma rays

Q: how many beta particles are released when 197 82 transmutes to 197 79 Au

A: Reaction: Au19782→Au79197+3e-+3ve

Q: Explain the most hazardous aspect of the presence of dust contaminated with an alpha emitter to an…

A: Alpha particles have a very low penetrating power. Hence, the human-skin can block the direct alpha…

Q: A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.…

A: A Geiger counter registers a count rate of N0 = 8000 per minute. After time t = 10 minutes, the…

Q: A Geiger counter registers a count rate of 7,200 counts per minute from a sample of a radioisotope.…

A: Given: A Geiger counter registers a count rate of 7,200 counts per minute from a sample of a…

Q: A Geiger counter registers a count rate of 4,800 counts per minute from a sample of a radioisotope.…

A: Given data:  Initial count rate (N0) = 4,800 counts per minute Time (t) = 10 minutes Remaining count…

Q: sheets of cardboard would be necessary to block 99% of beta radiation

A: Solution

Q: If a vial contains 600 MBq of iodine-123 (I-123) at 12:30 (14 June 2019), how much radioactivity…

A: It is given that

Q: A medical laboratory stock solution is prepared with an initial activity due to 24Na of 2.5 mCi/mL,…

A: Write the expression for the measured activity.

Q: A Geiger counter registerss a count rate of 6,800 counts per minute from a sample of a radioisotope.…

A:

Q: What is the activity in Ci of a 2.6 mg sample of 3H? VE ΑΣΦ Ro = What is the activity in Bq of a 2.6…

A:

Q: What characteristics of a material will make it a better absorber of gamma rays?

A: The characteristics of material that will make it a good gamma absorber is high density and high…

Q: Binding energy per nucleon for an element is 7.14 MeV. If the binding energy of the element is 28.6…

A:

Q: The exposure rate at 1 meter from a point source of 10 mCi of 137Cs is(r for 137CS is 3.3…

A:

Q: Cs- 137 source used in mining industry has an activity of 740 MBq as of August 14, 2017. What will…

A: The formula of the radioactivity is given by  R = Ro e-0.693 tT where, T is the half life, R is the…

Q: Calculate the activity and write your solution in a separate sheet of paper. Calculate the activity…

A:

Q: If a vial contains 400 MBq of fluorine-18 (F-18) at 12:00 on 20 March 2019, how much radioactivity…

A: The half-life of F-18 is 109.7 minutes. The time difference between the starting time and end time…

Q: How is it possible for a positively charged nucleus to release a negatively charged beta particle?

A: Required : How is it possible for a positively charged nucleus to release a negatively charged beta…

Q: The half-life of l-137 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in…

A: The formula of the radioactivity is  where, N is the amount left, No is the initial amount, t is…

Q: A beam of gamma rays passes through 4x10-3 kg of air and produces 1.7x1012 ions. What is the…

A: we have  mass M=4 x 10-3kg charge=1.7x1012x1.6x 10-19C=2.72x10-7C

Q: If a vial contains 600 MBq of iodine-123 at 12:30 (14 june 2019), how much radioactivity will be…

A:

Q: A clinical technician finds that the activity of a sodium-24 sample is 1,024 cpm. What will be the…

A: Half life is defined as the time required for the radioactivity of a radioactive element to drop to…

Q: technetium half life is 4.8 hours. If a patient receicves a dose with an activity of 35.9 mCi of…

A: Half life of technetium (t1/2) = 4.8 hours Initial activity (Ao) = 35.9 mCi

Q: number of alpha-decays of Q in the first one hour is;

A: Given: Determine number of alpha decays of Q in the first one hour ?Where,   A heavy nucleous Q of…

Q: A patient with thyroid cancer is given a sample of lodine-131 which has a half-life of 8 days. If…

A:

Q: Exposure dose of 4 x 10 C/Kg is equivalent to Rontgen. a)155 b)15.5 c)1.55 d) non of theses

A: Given: The exposure dose is 4x10 C/kg

Q: (b) Calculate the activity of a 5ug 24Na which has a half-life of 14.9 hours.

A: Given data: The mass of element is m=5 μg. The half life of element is t1/2=14.9 hr.

Q: The small intestine has a mucus layer approximately 200 um thick. A worker accidentally ingests a…

A: It is observed that a  5.5 MeV alpha particle can be stopped by a 40 um thick human tissue.  In the…

Q: Which type of radioact O Beta None of the above O Gamma O Alpha

A: Answer  The correct option is (c) ie gamma rays .

Q: A Geiger counter registers a count rate of 5,600 counts per minute from a sample of a radioisotope.…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…

A: The formula for the half-life is given by, Here, λ represents the decay constant.

Q: Find tne actiVity of a sample Containing 10aine-131 nuciei (T1/2=8.0 days) 701X 1019

A: Given data :                  Number of nuclei, N = 7.01×1014                  Half life , T1/2 = 8…

Q: A sample of 1.0 × 1010 atoms that decay by alpha emission has a half-life of 100 min. How many alpha…

A: According to the law of radioactive disintegration, Nt=N012tt12 Find the number of emitted alpha…

Q: What mass of fluorine -18. (F-18) is an activity of 10mCi? How long will it take for the activity to…

A: The half-life of F-18 is 109.7 m. The formula for the decay constant is:

Q: Find the activity of a sample containing 6.92 x10-6 g of  (T1/2 = 5.27 years).

A: Total sample,N=6.92*10-6 g. T½=5.27 years.

Q: If the minimum usable activity is 10 mCi, how long after delivery at the hospital is the sample…

A: Initial activity of C137s : Ao = 125 m Ci = 0.125 Ci Half-life of sample: ζ = 32.8 hours Activity at…