Edexcel IGCSE Physics 3.25P Speed of sound practical
Practise planning and evaluating speed of sound methods, using distance-time data, repeats, anomalies and reaction-time limitations.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- describe a method using a measured distance, timing, repeats and a mean value
- calculate speed of sound from distance travelled and time, including echo or repeated-hit setups
- handle anomalous times by ignoring or repeating them before calculating a sensible mean
3.25P Speed of sound practical question 1
[Maximum number: 5]
This question is about sound waves.
Describe an experiment to measure the speed of sound in air.
You may draw a diagram to help your answer.
Any FIVE from:
A fully labelled diagram can score all the marks.
MP1. measure time for a set distance;
allow measuring wavelength for a known frequency
MP2. realistic values suggested for experiment to work;
e.g.
- at least 1 m for microphones and oscilloscope method
- at least 100 m for seeing and hearing a clap method
- at least 50 m for wall and echo method
- wavelength measured at least 10 cm
MP3. suitable measuring instrument named;
e.g. stop clock, stopwatch, ruler, tape measure, oscilloscope, trundle wheel, timer
MP4. further detail of setup;
e.g.
MP5. idea of repeats AND average;
MP6. speed = distance / time;
allow speed = frequency × wavelength for appropriate
method
All question bank results loaded