![subject](/tpl/images/cats/fizika.png)
At what point is the half-life of a radioactive isotope reached?
A. When half the parent nuclei in a sample have become daughter nuclei
B. When all the daughter nuclei in a sample have become parent nuclei
C. When half the daughter nuclei in a sample have become parent nuclei
D. When all the parent nuclei in a sample have become daughter nuclei
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:30, lmolder1329
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 17:30, evanwall91
Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.
Answers: 2
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 19:00, lindseybug
The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 23:00, Miguel1310
According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring
Answers: 1
You know the right answer?
At what point is the half-life of a radioactive isotope reached?
A. When half the parent nuclei in...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/istoriya.png)
History, 05.05.2020 20:25
![Konu](/tpl/images/cats/geografiya.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 20:25
![Konu](/tpl/images/cats/obshestvoznanie.png)
![Konu](/tpl/images/cats/himiya.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 20:25
![Konu](/tpl/images/cats/en.png)
English, 05.05.2020 20:25
![Konu](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 20:25
![Konu](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 20:25