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Investigation To Find the Speed Of Sound.

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Introduction

*Joanne Hua*11Jupiter*Mr. Fullman*Physics Coursework*Speed Of Sound*Triple Award Science*

Investigation To Find the Speed Of Sound

Analysis

According to the graph, an increase in the distance causes an increase in the time.  This shows that they are directly proportional to each other.  There is a very strong trend in the graph, which shows a strong positive correlation.  I can tell this because I have drawn a line of best fit.  There don’t appear to be any major anomalies since all the points are either directly on the line or close to the line of best fit.  This shows that the results are relatively reliable.  However, the points that are not directly on the line of best fit could be

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Middle

                = 286m/s (to 3 s.f.)

I have worked out from the graph that the speed of sound through air is 286m/s (to 3 s.f).  Even though this does not match the general speed of sound through air, it is quite close.  The inaccuracies could be due to inaccuracy when hand-drawing the graph or when conducting the experiment.  

There is sufficient evidence to prove that the experiment was conducted correctly, (though slightly inaccurately) and that the results are reliable.

Evaluation:  

From the experiment, I was able to obtain relatively accurate results from which I was able to construct an accurate and informative graph.  I feel that the amount of results that I gathered was sufficient for me to come to a reliable conclusion.  The results are of a good quality since most of the points are either near or on the actual best fit line.

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Conclusion

Other sounds around the room and outside the room could affect the experiment so any background noise should be kept to a minimum since the QED could pick these up.

The graph was plotted with the average results of two experiments so this would also affect the overall result.  Instead of just doing two experiments to average, more experiments should be done before averaging it out.  This is to give way for any inaccuracies and ensure a larger chance of a more accurate result.

If the experiment was repeated, I would solve the problems I mentioned earlier.  I would also repeat the experiment more times to retrieve more accurate results, although I feel that the results I gained were already relatively accurate.  However, to obtain a result even closer to the general speed of sound, all of the precautions above should be put into action.

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