Use the microphone do determine a Doppler shift from a given base frequency. Continue reading “Doppler effect”
Archives: Experiments
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Measure the speed and travelled height from within an elevator using the pressure sensor.
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Using the acoustic stopwatch you can determine the duration of a free fall. (Note, that there is an alternative version using magnetic detection.)
Drop the smartphone along an array of magnets and analyze the recorded magnetic field to extract the linear acceleration. (Note, that there is a simple an alternative version using acoustic detection.)
Continue reading “Free fall (magnetic detection)”
Continuously determine the frequency recorded by the microphone and plot a history of this frequency over time.
This just gives the raw data from the phone’s gyroscope, which is a rotation rate in rad/s.
Measure the inclination of a plane.
The experiment “Light” just gives the raw data from the phone’s ambient light sensor.
The smartphone is mounted on an air track and accelerated by a weight on a string. An array of magnets is used, so the linear acceleration can be explored by measuring the magnetic field.
Continue reading “Linear acceleration on an air track”
The experiment “Location (GPS)” just gives the raw data from the phone’s GPS sensor.