Some types of MRI can produce images of resolution and detail similar to PET. Though the images are similar, MRI is generally preferred over PET for studies of brain function involving healthy subjects. Why?

Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…

A: Write the expression of decay rate. N=N0e-tt1/2

Q: What is the relationship between decay constant and mean life of a radioactive nucleus?

A: The mean life of a radioactive nucleus is calculated by using the formula τ=1λ , where λ is the…

Q: In preparation for an MRI scan, why are patients advised to remove sunglasses, jewellery, watches…

A: MRI is the image formed with help of magnetic resonance process. It use strong field of magnet and…

Q: Why is carbon dating ineffective in finding the ages of dinosaur bones?

A:

Q: How much is the mass of the sample in grams of Po-218 that has an activity of 5.00 x 1019 Bq? The…

A: Given Activity = rate of disintegration = 5 × 1019 Bq = 5 × 1019 disintegration/second Half life =…

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: The age of the Dead Sea Scrolls was found by carbon dating. Could this technique apply if they were…

A:

Q: How X-ras work?

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

Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…

A: Given: The half-life of tritium = 12.3 years Amount of tritium present in the old brand =1256

Q: Question 1. There are four factors: A, B, C, D. We assume that each replicate was considered as a…

A: Yate's Algorithm: Note: X=factorial effect X and total SSX=sum of squares due to X=X232…

Q: In terms of biological damage, how many rad of heavy ions are equivalent to 100 rad of x - rays?

A: Write the expression for the biological damage caused by the X-rays with a quality factor of 1.

Q: What is beta particle?

A:

Q: The shroud of Turin, which shows the negative image of the body of a man who appears to have been…

A: Given: The half-life of carbon-14 is 5,730 years, but we need to calculate the value of the k

Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…

A:

Q: the mass excess of an alpha particle greater than or less than the particle’s total binding energy?

A:

Q: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…

A:

Q: hat is the approximate radius of a 112/48 Cd nucleus?

A: Given: The element is 112/48 Cd.

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: Calculate the CT numbers (HU) for the following tissues at given X-ray beam energies. Indicate…

A: The CT value of tissues on CT scan is the measure of their relative density on CT scan compared to…

Q: Monique, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…

A:

Q: Is carbon dating appropriate for measuring the age of materials that are a few years old? A few…

A: Carbon dating is best suited for a few thousand years as the half-life of carbon 14 is 5000 years.

Q: A radioisotope produces an intensity of 7.52 x 10^4 becquerel (Bq) at a distance of 1.00 cm from the…

A:

Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…

A: The amount remaining is equal to the original amount times 1/2 raised to the of half-lives that have…

Q: (a) Neutron activation of sodium, which is 100% 23 Na ,produces 24 Na , which is used in some heart…

A:

Q: In preparation for an MRI scan, why are patients advised to remove eyeglasses, watches, jewelry, and…

A: MRI means magnetic resonance imaging.

Q: 74As is a beta-plus emitter used for locating tumors with PET. What is the daughter nucleus? 73 A.…

A:

Q: If Th-234 emits a beta particle, what nucleus is formed?

A:

Q: A sample containing l-131 has an activity of 6.40 x 10° Bq. How many days later will the sample have…

A:

Q: The disintegration rate of a certain radioactiv sample at any instant is 4750 disintegrations per…

A: Decay constant determines the rate of decay. Here, we calculate  the given as follow;

Q: You find a 37.2 g fossilized bone that has an activity of 0.024 counts per second. How old is the…

A: A living matter has 1.3×10-10 % of C-14, and the half-life of C-14 is 5730 years. Thus, determine…

Q: Please help I badly need help. ASAP What is (a) an alpha particle? (b) beta particle? (c) a gamma…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…

A: N/N0 = (1/2)n  N = total time / T1/2

Q: iodine 131 has a half life of 8.04 days if you start with a radioactivr I 131 sample having an…

A: Half life of I-131 isotope = 8.04 days Initial activity (Ao) = 40 micro Ci Final activity (A) = 4…

Q: A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. If the original activity…

A: Given:- Original activity (Ao)=1.7 times 104 Bq. Time (t) = 2.2 hours Half life = 6.05 h Find…

Q: What is the difference between fast scan and slow scan in CT?

A: Computed tomography, also known as 'CT scan' is used to examine the structures inside human body. A…

Q: What is the radius of an α particle in femtometers? Assume that the α particle is well-described by…

A: The particle which resides in the nucleus is called the nucleons. Protons and neutrons are found…

Q: Why is radon more closely associated with inducing lung cancer than other types of cancer?

A: Radon is odorless, colorless, gaseous radioactive element.

Q: Explain the contribution of Marie Curie in nuclear radioactivity.

A: Marie curie discovered two new element radium and polonium with their radioactive property she was…

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…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.