| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.HL.TZ2.14 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 14 | Adapted from | N/A |
Question
An object emitting a sound of frequency 100 Hz orbits in a horizontal circle at a rate of two revolutions per second.
An observer standing a short distance away from the object is able to hear the sound. Which of the following describes the sound the observer is able to hear?
A. A sound of constant frequency but varying in amplitude
B. A sound of constantly varying frequency
C. A sound with a frequency of 50 Hz
D. A sound with a frequency of 200 Hz
Markscheme
B
Examiners report
[N/A]
