• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Making Sense of Data.

Extracts from this document...

Introduction

Mike Hodges

Making Sense of Data

image31.pngimage10.pngimage21.pngimage00.pngimage01.png

image46.pngimage44.pngimage45.pngimage41.png

image47.pngimage02.png

image03.pngimage03.pngimage04.png

image06.pngimage06.pngimage05.png

image07.png

image08.png

image11.pngimage09.png

image13.pngimage12.png

image14.png

image16.pngimage15.png

image17.png

A loudspeaker is held over a glass tube, one end of which is submerged in water.  The frequency from the signal generator is set, and the tube is moved until it resounds at the fundamental frequency, causing a raise in volume.  

This raise in volume is caused by the manner in which the sound waves travel through the tube.  The wave travels down the pipe, is reflected off of the water, and leaves the tube.  There is a node at the closed end, as the air in contact with the water is permanently at rest, and an anti-node at the end of the pipe, where the air is free to vibrate.

...read more.

Middle

image24.pngimage37.pngimage27.pngimage36.pngimage26.pngimage35.pngimage29.pngimage03.pngimage28.pngimage34.pngimage42.pngimage33.pngimage32.pngimage43.pngimage22.png

These vibrations extend a little out of the edge of the tube.  The distance extended, or end correction (c), is directly proportional to the radius of the pipe:

c = 0.58 × radius

You can also find the end correction by constructing the graph with the reciprocal of the frequency against the length of the pipe.  The difference between zero and the point at which the trend line crosses the x-axis will give you the end correction of the pipe.  

This is the equation of the trend line.  

 = 0.0118image48.png + 0.0001

Therefore, when image55.png = 0:

image63.png

image64.png

Hence, the end correction of the tube is 0.0085m.  

Using the relationship:

c = 0.6 × radius, where the radius is 1.2 cm

c = 0.6 × 0.012m

c = 0.0072m

The result I obtained from the graph differs slightly to this.

...read more.

Conclusion

My experiment was successful, but my results vary slightly from those achieved with the different formula.  My judgement of the fundamental frequency will also have a major effect on my results.  Another source of error could be the signal generator.  

With the equipment I was given, I could only take measurements to the nearest millimetre, and if I were to redo this experiment, I would try to take results that are more accurate.  In addition, I would use a wider range of frequencies, as this may be the reason for differences with the worked answers.  

Despite most of my results being acceptable, I did however obtain one anomalous result.  This result, highlighted in the table, has not been included in any averages, or graphs.  

...read more.

This student written piece of work is one of many that can be found in our GCSE Waves section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Waves essays

  1. Marked by a teacher

    Resonance of a Wine Glass

    3 star(s)

    I connected the oscilloscope to the power supply and adjusted the settings to my liking. I then attached the highly sensitive microphone to a jar of around the same height as the wine glass using selotape. Finally I selotaped the glass to the work area so as the distance between

  2. Investigating the speed of travelling waves in water.

    At first, when lowering the tray, I waited for the wave to travel to the end of the tray and on it's first reflection, I timed it when it passed the marking.

  1. Light is so common that we often take it for granted.

    Scientists do not understand why this is true. The fact that light in a vacuum has only one speed forms one of the foundations of Einstein's theory of relativity (see RELATIVITY [Special theory of relativity]). When light enters a material, it continually runs into atoms that delay its travel. But between atoms, light travels at its normal speed.

  2. There are several ways of sharing information - Statistical information - data.

    Adding a cumulative frequency column on Table B can show this: Types of donations ($) # Of donations Cumulative Frequency Under 100 2 2 100 - 200 8 10 200 - 300 11 21 300 - 400 22 43 400 - 500 28 71 Above 500 29 100 By creating

  1. Soil water content in relation to species diversity in a Pingoe.

    This procedure is then repeated 8 times in order to work out the cumulative estimate of the frequency. It was when the cumulative frequency no longer fluctuates that the number of quadrats taken can be seen. The minimum size for the quadrat (corresponds with graph A)

  2. The aim of my experiment is to see what factors affect electromagnetism the most ...

    The coil wraps can't be side by side because then I wouldn't be able to place the paperclips in between them, which is where the magnetic field occurs most strongly. If I place the paperclips on either end of the nail where there are no coil wraps then I would expect to find little magnetism.

  1. Investigate the relationship between sound pressure level (SPL) and signal amplitude.

    Theories Due to the wide range, (e.g. from about N/m at 1000 Hz (threshold of audibility) totimes greater) SPL measurements are made on a logarithmic (decibel) scale. SPL = RMS x Amplitude Intensity Level (L) = Sound Pressure Level (SPL)

  2. Is the speed of sound affected when it travels threw different temperatures of air

    According to this equation, sound travels at 331.4m/s at zero degrees Celsius. For every degree raise in temperature, the velocity increases by 0.6m/s. Prediction . I predict that the velocity of sound will increase the hotter air becomes because the density is being altered if the air is very hot then there will be a high density.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work