For your equation
Substitute the points and
What do you get?
Hi, This is my first post, i couldn't find a proper category for my topic, so I'll post it here. having troubles understanding these questions...
I have attached the two questions... thanks. They use the Q = Qo*e^kt and Q = Qo*e^-kt formula structures. Thank you very much in advance.
I found these points from you question.
At t=0 the amount of radioactive material is , is this clear why?
Now the meaning of half life is the time taken for the radioactive material to reduced to half of its original self.
From the question, when t=1600 then the initial amount is halved i.e
turns out I didn't get it. my tutor said for part a), do 500 / 1600 to get 0.3125 = 31%, then just do 50% - 31% = 19%
for part b) my tutor said to go from 100% to 50% that's a half life so it = 1600 years, then to go from 50 to 25% that's another 1600 years and so now we are at 75%. 1600 + 1600 = 3600 years.
turns out you didn't need to use the formula for this question, bit weird. but makes kinda sense this way.
qs 14 I do not know.