23.3b Ex3 MJ15 P41 Q9 Decay Law Expressions | A2 Nuclear Physics | Cambridge A Level Physics скачать в хорошем качестве

23.3b Ex3 MJ15 P41 Q9 Decay Law Expressions | A2 Nuclear Physics | Cambridge A Level Physics

Example 3 - 9702/41/M/J/15: (a) An isotope of an element is radioactive. Explain what is meant by radioactive decay. #9702s15p41 #Lv3 #A2decayLaw (b) At time t, a sample of a radioactive isotope contains N nuclei. In a short time Δt, the number of nuclei that decay is ΔN.State expressions, in terms of the symbols t, Δt, N and ΔN for (i) the number of undecayed nuclei at time (t + Δt), (ii) the mean activity of the sample during the time interval Δt, (iii) the probability of decay of a nucleus during the time interval Δt, (iv) the decay constant. (c) The variation with time t of the activity A of a sample of a radioactive isotope is shown in Fig. 9.1. The radioactive isotope decays to form a stable isotope S. At time t = 0, there are no nuclei of S in the sample. On the axes of Fig. 9.2, sketch a graph to show the variation with time t of the number n of nuclei of S in the sample. #A2decayGraphP4 #A2nuclearPhysics Playlist:    • Ch23 Nuclear Physics | CAIE 9702 A2 Physics   Instagram Pocket Guide (  / etphysics  ) More Resources (https://9702-physics.blogspot.com/) Support us! (  / etphysics  ) Tuition/Tutoring inquiries: Email: suitlin@gmail.com Whatsapp: https://wa.me/60126679171 9702_s15_qp41 May/June 2015 #CambridgeALevelPhysics