1.
State what is meant by the inverse-square law for gamma. [1]
JD SCIENCE
Thermal and nuclear physics
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by exponential decay. [1]
3.
State what is meant by binding energy. [1]
4.
State what is meant by mass defect. [1]
5.
State what is meant by nuclear fission. [1]
6.
State what is meant by nuclear fusion. [1]
7.
State what is meant by background radiation. [1]
8.
State what is meant by safety. [1]
9.
State what is meant by the inverse square experiment. [1]
10.
State what is meant by a decay chain. [1]
11.
Jac is asked about the inverse-square law for gamma in a Eduqas Physics paper.
(a) Describe the inverse-square law for gamma. [2]
(b) Explain why the inverse-square law for gamma is important in this topic. [3]
12.
Jac is asked about exponential decay in a Eduqas Physics paper.
(a) Describe exponential decay. [2]
(b) Explain why exponential decay is important in this topic. [3]
13.
Jac is asked about binding energy in a Eduqas Physics paper.
(a) Describe binding energy. [2]
(b) Explain why binding energy is important in this topic. [3]
14.
Jac is asked about mass defect in a Eduqas Physics paper.
(a) Describe mass defect. [2]
(b) Explain why mass defect is important in this topic. [3]
15.
Jac is asked about nuclear fission in a Eduqas Physics paper.
(a) Describe nuclear fission. [2]
(b) Explain why nuclear fission is important in this topic. [3]
16.
Jac is asked about nuclear fusion in a Eduqas Physics paper.
(a) Describe nuclear fusion. [2]
(b) Explain why nuclear fusion is important in this topic. [3]
17.
A=λN. λ=0.010 s⁻¹, N=5.0×10¹⁸ [3]
18.
T½=8.0 days. λ [3]
19.
N/N₀ after 3 half-lives [3]
20.
I₂/I₁ = (x₁/x₂)². x doubles, I [3]
21.
E=mc². 1.0×10⁻⁶ kg [3]
22.
Activity falls from 240 to 30. Half-lives [3]
23.
Jac carries out a Eduqas-style required practical linked to nuclear physics. This is a typical Eduqas required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Jac carries out collecting valid data for nuclear physics. This is a typical Eduqas required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Jac carries out drawing a graph for nuclear physics. This is a typical Eduqas required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Jac carries out evaluating a method about nuclear physics. This is a typical Eduqas required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare the inverse-square law for gamma with exponential decay. [4]
28.
Compare exponential decay with binding energy. [4]
29.
Compare binding energy with mass defect. [4]
30.
Compare mass defect with nuclear fission. [4]
31.
Apply your knowledge of background radiation to this situation: varies with location [3]
32.
Apply your knowledge of safety to this situation: ALARA [3]