DP Physics (last assessment 2024)
Question 21N.2.SL.TZ0.b.iii
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.2.SL.TZ0.b.iii |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Estimate | Question number | b.iii | Adapted from | N/A |
b.iii.
[Maximum mark: 1]
21N.2.SL.TZ0.b.iii
A longitudinal wave travels in a medium with speed 340 m s−1. The graph shows the variation with time t of the displacement x of a particle P in the medium. Positive displacements on the graph correspond to displacements to the right for particle P.
Another wave travels in the medium. The graph shows the variation with time t of the displacement of each wave at the position of P.
Estimate the amplitude of the resultant wave.
[1]
Markscheme
8.0 OR 8.5 «μm» ✓
From the graph on the paper, value is 8.0. From the calculated correct trig functions, value is 8.49.
