DP Physics (last assessment 2024)
Question 18M.3.SL.TZ2.5b.ii
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.SL.TZ2.5b.ii |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Determine | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
18M.3.SL.TZ2.5b.ii
Observer A detects the creation (event 1) and decay (event 2) of a nuclear particle. After creation, the particle moves at a constant speed relative to A. As measured by A, the distance between the events is 15 m and the time between the events is 9.0 × 10–8 s.
Observer B moves with the particle.
For event 1 and event 2,
(b.ii)
determine the time between them according to observer B.
[2]
Markscheme
ALTERNATIVE 1
Evidence of x′ = 0
t′ «» = 7.5 × 10–8 «s»
ALTERNATIVE 2
γ = 1.2
t′ «= » = 7.5 × 10–8 «s»
[2 marks]
