OCR physics The answer is C but how do I get there?

Watch this thread
Locire
Badges: 1
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 1 month ago
#1
A student is modelling the decay of a radioactive source using the equation ΔN/Δt = −0.5N.The student decides to use Δt = 0.10s.The number N of radioactive nuclei is 2000 at t = 0.Part of the modelling spreadsheet from the student is shown below. t/s Number N of radioactive nuclei remaining at time t Number of nuclei decaying in the next 0.10s0.00 2000 1000.10 1900 0.200.30What is the value of N at t = 0.30s?A 1700B 1710C 1715D 1805
0
reply
adam.jmg04
Badges: 9
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 4 weeks ago
#2
Use the equation N = N₀e^-λt , the way you have written out the question is quite confusing as I presume you just copied and pasted it, so the layout is a bit weird, but start off by using that equation.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

Does school Maths prepare people well enough for the future?

Yes, it gives everyone a good foundation for any future path (39)
32.23%
Somewhat, if your future involves maths/STEM (55)
45.45%
No, it doesn't teach enough practical life skills (26)
21.49%
Something else (tell us in the thread) (1)
0.83%

Watched Threads

View All