Whatson 27-31 Mock Paper II Test .:. Go Up

Do *all* of section A, and 2 out of 3 in section B

**Key:**

27:18a - Chapter 27, problem 18, part a

27-3 - conceptual question regarding material in section 27-3 in your book

PQ27#4 - PreQuiz 27, problem 4

**Section A Photoelectric
graph**

(a) Explain how the apparatus works (read section 27-3)

(b) Make a graph of photoelectric data with uncertainties (Like graph lab)

(c) Calculate the best guess, min and max gradients (slopes) (Like graph lab)

(d) Calculate Plancks constant from slopes (Like graph lab)

(e) Unrelated photoelectric effect problem (like Problem 27:18a 0.70 eV and like PQ27#3)

(f) What are the different predictions made by photon and wave theories regarding the photoelectric effect. (read section 27-3)

**Section B B1, B2,
B3 do 2 out of 3:**

**Question B1 Closest approach, photon energy and
momentum**

(a) Distance of closest approach. (Like Example 1 from the Rutherford and Bohr noteguide, like PQ27#4)

(b) Conceptual question about the effect of the atomic number of the bombarded nucleus.

(c) Photon energy from wavelength (like problem 27:12 1.77 eV, 3.10 eV, Like PQ27#2)

(d) Photon momentum using de Broglie equation (Like PQ27#5 but easier)

(e) Net force exerted on surface by photons (Like problem
27:72 5.3x10^{18} photons/sec - this is solved on the Wiki
here)

(f) Conceptual question about momentum (reflection versus absorption)

**Question B2 Radioactive decay**

(a) Question about isotopes (read section 30-1)

(b) Balance a complete beta decay reaction including neutrinos vs anti neutrinos (top of page 927) (read section 30-5)

(c) Draw a graph of the decay based on the half life (like the graph in the Decay rates noteguide)

(d) Calculate the decay constant from the half life (like problem 30:37 in reverse)

(e) What is the activity after a certain amount of time?
(like problem 30:44c 5.7x10^{13} decays/sec and Like PQ30#5)

(f) Time to reach a certain activity. (like problem 30:44d 25.5 min and Like PQ30#5)

(g) Conceptual question on radioactive decay (read section 30-3)

**Question B3 Nuclear reactions**

(a) Balance a nuclear fission reaction (read section 31-2, Like PQ30#2)

(b) Calculate the energy released by the reaction (like problem 31:17 (solved on the Wiki here) , Like PQ30#4)

(c) Calculate the mass of fuel needed to create a certain power for a year. (like problem 31:20 0.116 g - This is solved on the Wiki here)

(d) Advantages of nuclear power (read section 31-2 and 15-12)

(e) Drawbacks of nuclear power (read section 31-2 and 15-12)

(f) Fusion vs fission (read sections 31-2, 3)

(g) What factors must be present for fusion to occur (read section 31-3)