Table of Contents
- 1 What is the half-life of iodine 126?
- 2 How do you calculate the activity of a radioactive sample?
- 3 What can half-life be used for?
- 4 What is the difference between iodine 127 and iodine 131?
- 5 What is the half-life of radiotherapy?
- 6 How much weight can you lose by cycling a week?
- 7 Is cycling a good form of exercise?
What is the half-life of iodine 126?
Nuclear properties of iodine isotopes
| Isotope | Half life | Major production mode |
|---|---|---|
| 126I | 13 | 127I(n,2n) 126I |
| 128I | 25.0 | 127I(n,γ) 128I |
| 129I | 1.57×107 | Fission |
| 130I | 12.4 | Fission, 129I(n,γ) 130I |
How do you calculate the activity of a radioactive sample?
- Activity = λN.
- = (0.693/8 days) x (1/86,400 sec/day) x (3 x 1017 atoms)
- = 3 x 1011 atoms/sec I-131.
- = 3 x 1011 dps I-131.
How many years is a half-life?
Definition and Formula One of the most well-known applications of half-life is carbon-14 dating. The half-life of carbon-14 is approximately 5,730 years, and it can be reliably used to measure dates up to around 50,000 years ago.
What half-life means?
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …
What can half-life be used for?
The half-life of an isotope is used to describe the rate at which the isotope will decay and give off radiation. Using the half-life, it is possible to predict the amount of radioactive material that will remain after a given amount of time.
What is the difference between iodine 127 and iodine 131?
What is iodine 131? Iodine found in the natural environment is called iodine 127. On the other hand, iodine 131 is rarely found in the natural world, but exists in large amounts in nuclear reactors. Iodine 131 is radioactive and changes to a substance called xenon.
What is the half-life of I 131?
Radioactive Iodine The 131I isotope has a half-life of 8 days and emits γ radiation and β particles.
How long does it take for 90\% of a given quantity of the radioactive element cobalt-60 to decay given that its half-life is 5.3 years?
1 For cobalt-60, which has a half-life of 5.27 years, 50\% remains after 5.27 years (one half-life), 25\% remains after 10.54 years (two half-lives), 12.5\% remains after 15.81 years (three half-lives), and so on.
What is the half-life of radiotherapy?
The radioactive isotope cobalt-60, which is used for radiotherapy, has, for example, a half-life of 5.26 years.
How much weight can you lose by cycling a week?
Finally, for people looking to lose 1 to 15 pounds, Stevens recommends them to lose half a pound a week by adding on an extra 20 minutes onto each ride. While cycling generally is a safe sport, nearly 580,000 people visit the emergency room each year due to bike accidents.
How many days a week should I Rest my Bike?
If you’re cycling for fitness, you may want to give yourself at least 1 full day of rest each week. This is especially important if you ride at a high intensity, or find your body getting sore in specific ways. If you have any injuries that cycling will affect, it’s best to stay off the bike until you fully recover.
Does cycling 30 minutes a day strengthen the upper body?
Cycling 30 minutes a day strengthens leg muscles and your cardiovascular system, but provides only limited exercise for your upper body. You can achieve better physical fitness and lower the chances of injury with upper body strength training.
Is cycling a good form of exercise?
Takeaway. Share on Pinterest. Cycling is a low impact aerobic exercise that offers a wealth of benefits. It also varies in intensity, making it suitable for all levels. You can cycle as a mode of transport, for casual activity, or as an intense, competitive endeavor. Cycling is a wonderful workout that keeps you active.
https://www.youtube.com/watch?v=ksJFLPDG22o