Answer:
The answer is D - near the roof.
Explanation:
Attics don't have a ton of insulation or hard cinder-block to block the goggles form seeing through it. This is why the attic can be a place where the temperature varies with the outside temperature.
Answer:
0.03127 fraction of a sample of this nuclide would remain after 12.5 hrs.
Explanation:
Initial mass of the isotope =
Time taken by the sample, t = 12.5 hour
Formula used :
where,
= initial mass of isotope
N = mass of the parent isotope left after the time, (t)
= half life of the isotope = 2.5 hour
= rate constant
Now put all the given values in this formula, we get
0.03127 fraction of a sample of this nuclide would remain after 12.5 hrs.