• 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...


Mike Hodges

Making Sense of Data













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.



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:



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.


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

    Investigation:To find the refractive index of cooking oil.

    4 star(s)

    If light does not travel through a material then the atom is not re-emitting the electron. Before I completed this investigation I predicted that the refractive index of cooking oil would be between the refractive index of water and glass.

  2. Marked by a teacher

    Resonance of a Wine Glass

    3 star(s)

    When the energy is reduced, so is the frequency of the wave in the glass.6 Errors There could be a relationship between the pressure forced upon the glass by my finger and the voltage signal produced. This would mean the varying pressure of my finger would cause errors in the results.

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

    get itself to be 0 so that when it is multiplied by the constant the answer will be 0. Any value above this specific coil number will still have to minus this value but since it is bigger than the minus number then it will give a value of grams

  2. Investigating the speed of travelling waves in water.

    From the graph, it is possible to see that the gradients would be very different from each other, showing that the uncertainty is high. The gradient of the top line is 16.9 The gradient of the lowest line is 12.8 The difference between them is 4.1 The difference between the

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

    of the three resonance tubes will have water in it to chill the air in the tube or air column to the temperatures needed). Start with a very short air column with the tuning fork held above it, gradually increase the length of the tube until a strong resonance occurs.

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

    With the knowledge of frequency distributions, a cumulative frequency can be made. A cumulative frequency represents the number of items that have values either above or below a particular level. It is the frequency written as a running total of frequencies.

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

    It would be expected that the more water available the greater the spices diversity. It would also be expected that the amount of water present in the ground would depend on the relief of the land. Method In order carry out this investigation the size of the quadrat that should

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

    Since red light is still being emitted, the cooling poker looks red. Other sources of light. Many substances gain energy and emit light without being heated very much. They do this through a process called luminescence. Some luminescent materials glow in the dark long after they have received extra energy.

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