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A half-life of one hour means that, in one hour, one half of an unstable nuclear substance, a quantity of some radionuclide, will decay. Since half-life is logarithmic, after a second hour, half of the half will decay, leaving one quarter, and, after a third hour, half of the quarter will remain, leaving one eighth, and so on. The equation for half-life is ...
AT = A0 2(-T/H)
... where A0 is the starting activity, AT is the activity remaining after some time T, and H is half-life in units of T.
Note that many radionuclides, when they undergo a decay event, will transmute into some other radionuclide, which also has a half-life. A consequence of this is that many samples have several different decay "daughter" products, with different half-lives and different equilibrium states, so the technique of measuring the amount of material can often be complex. Also, some radionuclides have multiple decay schemes, each with a different probability and each with a different half-life, again, complicating things.
Usually, half-life is constant so, if you can measure the half-life, you can often identify the radionuclide. The exception to this is radionuclides that decay by beta+ decay, but they have insufficient excess energy in the nucleus to initiate that without electron capture, but they are also in an ionized state, having no electrons. In this case, it will appear that half-life is extended.
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What is the Half life of penicillin?
The half-life of penicillin varies depending on the specific type. For example, the half-life of penicillin G is typically around 30 minutes to 1 hour in the body. Penicillin V, another common type, has a slightly longer half-life of around 1 hour to 1.5 hours.
How many seconds in a quarter of an hour?
There are 60 minutes in an hour and since "half an hour" is half of an hour, it will contain 30 minutes. Simply divide 60 by 2 to get the answer.
What is curie half life?
Half-life depends on the particular nuclide involved. You did not specify which nuclide. Please restate the question. Curie is a unit of radioactivity, expressed as 3.7x1010 disintegrations per second. It is not a radionuclide. If you meant curium, you still need to specify which isotope, because curium has several. The longest lived isotope of curium is 96247Cm, with a half-life of 1.56x107 years.
What is an isotope that the time it takes it to decay to half its original mass?
c.half-life
What is the half life of promethium?
Promethium 145 has a half life of 17.7 years. Promethium 146 has a half life of 5.53 years. Promethium 147 has a half life of o.22 years.
What is meant by one half hour?
Thirty minutes.
How far is daily city from Santa Rosa?
If you meant daly city, it is about an hour in a half.
State what is meant by half life of radioactive isotopes?
This is the time in which half the the atoms was disintegrated.
What is the Half life of penicillin?
The half-life of penicillin varies depending on the specific type. For example, the half-life of penicillin G is typically around 30 minutes to 1 hour in the body. Penicillin V, another common type, has a slightly longer half-life of around 1 hour to 1.5 hours.
How much game battery life does a ipod touch have?
About an hour and a half.
What is the half-life of nitrofurantoin and how does it impact its effectiveness in treating bacterial infections?
The half-life of nitrofurantoin is around 1 hour. This means that after 1 hour, half of the drug is eliminated from the body. The short half-life of nitrofurantoin requires frequent dosing to maintain effective levels in the body for treating bacterial infections.
Is 30 minutes in half an hour?
Well, honey, you must have missed the memo on basic math. Yes, 30 minutes is indeed half an hour. It's like asking if a square has four sides - it's just common sense.
In Half an hour Is half a noun?
Yes. Half is a noun and half an hour (half of an hour) is a time period.
What is half of an hour of an hour?
A half-life of one hour means that, in one hour, one half of an unstable nuclear substance, a quantity of some radionuclide, will decay. Since half-life is logarithmic, after a second hour, half of the half will decay, leaving one quarter, and, after a third hour, half of the quarter will remain, leaving one eighth, and so on. The equation for half-life is ...AT = A0 2(-T/H)... where A0 is the starting activity, AT is the activity remaining after some time T, and H is half-life in units of T.Note that many radionuclides, when they undergo a decay event, will transmute into some other radionuclide, which also has a half-life. A consequence of this is that many samples have several different decay "daughter" products, with different half-lives and different equilibrium states, so the technique of measuring the amount of material can often be complex. Also, some radionuclides have multiple decay schemes, each with a different probability and each with a different half-life, again, complicating things.Usually, half-life is constant so, if you can measure the half-life, you can often identify the radionuclide. The exception to this is radionuclides that decay by beta+ decay, but they have insufficient excess energy in the nucleus to initiate that without electron capture, but they are also in an ionized state, having no electrons. In this case, it will appear that half-life is extended.
Half and hour vs half hour?
The term is actually "half an hour" which is short for "half of an hour". This has same meaning as "half hour" or a rough approximation of 30 minutes.
How long does ampicillin stay in your system?
Half life of ampicillin is 1 hour.
What is the half-life of the element that registers 360 counts per hour and 18 hours later the rate becomes 45 counts per hour?
After 3 half lifes there will 45 counts per hour (360 -> 180 -> 90 ->45). Therefore 3 half lifes equals 18 hours. One half life is therefore 6 hours.
