Designing, Creating and Calibrating a Timing Device

Satisfactory Essays
Designing, Creating and Calibrating a Timing Device


Using our knowledge from Biology, Chemistry and Physics, we were to

design a timing device to measure the length of music played on the

final day of this project. In our group, we separated into three

teams to create three different timing devices. This report is on one

of the timing devices, named the Fermentation Clock created by Elaine

Wong and Aki Kuboyama.

The Fermentation Clock is a simple device in which dilute hydrogen

peroxide is added to yeast, which is one of the Biology experiments

for studying fermentation. As the yeast reacts with hydrogen

peroxide, it releases heat energy at a fairly consistent rate. By

using the temperature-time relation in this experiment, we calibrated

a standard curve which was later used to measure the length of music.

Further more, before calibration, we experimented with different

concentrations of hydrogen peroxide as well as different masses of

yeast to find the best amount of each to create the most suitable

standard curve. We found that 180mL of water and 20mL of hydrogen

peroxide added to 1.00g of yeast gave the most consistent rate of

temperature change from 2 to 6 minutes which was the predicted length

of time of the music. Needless to say, the process of testing these

concentrations comes from the basic principles of Chemistry


Also, to increase the efficiency of the device, we insulated the

beaker of yeast with cotton and styrene foam so the maximum heat will

be applied to the thermometer, an aspect of Physics. This is

important because the greater the temperature rise, the more accurate

the approximation. We considered placing the beaker of yeast into a

styrene foam container to maximise the temperature rise but

unfortunately, could not find any suitable containers so this was











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