Answer: 33.35 minutes
Explanation:
A(t) = A(o) *(.5)^[t/(t1/2)]....equ1
Where
A(t) = geiger count after time t = 100
A(o) = initial geiger count = 400
(t1/2) = the half life of decay
t = time between geiger count = 66.7 minutes
Sub into equ 1
100=400(.5)^[66.7/(t1/2)
Equ becomes
.25= (.5)^[66.7/(t1/2)]
Take log of both sides
Log 0.25 = [66.7/(t1/2)] * log 0.5
66.7/(t1/2) = 2
(t1/2) = (66.7/2 ) = 33.35 minutes
The process of using magnetic fields to produce voltage.
Answer:
(Option B)
Explanation:
The absolute pressure of the air-filled tank is:
![P = 101.3\,kPa + \left(1000\,\frac{kg}{m^{3}} \right)\cdot \left(9.807\,\frac{kg}{m^{3}} \right)\cdot (5\,m)\cdot \left(\frac{1\,kPa}{1000\,Pa} \right)](https://tex.z-dn.net/?f=P%20%3D%20101.3%5C%2CkPa%20%2B%20%5Cleft%281000%5C%2C%5Cfrac%7Bkg%7D%7Bm%5E%7B3%7D%7D%20%5Cright%29%5Ccdot%20%5Cleft%289.807%5C%2C%5Cfrac%7Bkg%7D%7Bm%5E%7B3%7D%7D%20%5Cright%29%5Ccdot%20%285%5C%2Cm%29%5Ccdot%20%5Cleft%28%5Cfrac%7B1%5C%2CkPa%7D%7B1000%5C%2CPa%7D%20%5Cright%29)
![P = 150.335\,kPa](https://tex.z-dn.net/?f=P%20%3D%20150.335%5C%2CkPa)