- Messages
- 36
- Reaction score
- 10
- Points
- 18
it's way more. you have to deduct background radiation which was around 14 counts per minute.
you find that from the graph (it is the point after which the counts do not decrease anymore)
52-14= 38
38/2= 19 counts per minute
find out how long it took to come to 19 counts per minute.
should be more than 3 days.
but after you get 19 counts per minute you have to add the background radiation again because remember, the graph shows counts/minute INCLUDING background radiation
so you add 14 to 19 and you get 33
number of days to reach 33 is 1.6 days
and the bulb question, i got the answer as 8 or 9 but unfortunate for me, i solved it after the paper was taken......... no time for writing it down
i could only deduce the total resistance of the circuit if the current was 0.9A, which is 266.67 ohms, after that the teacher snatched my paper
(p.s. i left this question for the last, everything else i finished)