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

Physics lab into the decomposition rate and the mass of the chewing gum

Extracts from this document...

Introduction

Ankit Shahi                September 24 2009

An investigation into the relationship between the decomposition rate and the mass of the gum

The aim of the experiment is to find the relationship between the rate of decomposition (chewing) and the mass of the chewing gum. This would be done by chewing the same type of (non-sugar free) gum for different times, t, and then weighing the mass, m, of the gum using the electronic balance.

Chewing the gum for different times, would result in different amounts of sugar lost by the gum (sugar is taken into account since the amount of sugar as an ingredient is the most in the gum). The loss of sugar would decrease the mass, of the gum, which helps us predict that the faster the rate of decomposition (chewing process) the more amount of sugar will lose and therefore the mass of the gum would decrease more and more.

In this lab the manipulated variable would be the decomposition (chewing) rate. This would be determined by chewing the gum for different amounts of time. The responding variable would be the mass of the gum.

...read more.

Middle

6.34

120.000

5.30

5.45

5.72

180.000

4.91

4.56

4.83

240.000

4.11

4.02

4.51

300.000

3.76

3.32

3.87

Mass of gum without wrapper:

(6.25 – 1.00) = 5.25g

Errors: (0.01 + 0.01) = 0.02

Calculating Average sound

Avg.= (5.25 + 5.15+ 5.34) / 3 = 5.25g

Calculating errors for the average sound:

Eavg = (0.02+0.02+0.02) /3 = 0.02

Calculating the difference in mass:

Difference = (Initial mass) – (Final average mass)

Difference = 8 – 5.25

Difference = 2.75

Calculating errors for the average mass:

Error = (0.02 + 0.02) = 0.04

Presented data: Calculated average final mass of the gum and the difference in mass with their times

Time ( + 0.005s)

...read more.

Conclusion

+ 0.0005 g/s. This result is found from the slope of a liner graph which in this case tells the proportionality factor between avg. difference of mass and the time.  

Evaluation:

The lab was a success. This can be seen form the linear relationship between average difference of mass of the gum and the rate of decomposition. But there were some minor problems that occurred during the lab, as it can be seen that the slope varies about

+ 0.0005. One problem could have been that the gum when weighed after it was chewed was sticking to its wrapper.  This caused it to gain more mass because the tiny bits of wrapper might got stuck in the gum thus increasing its mass.

Improvements:

The problem could be solved by using the weigh boat instead of the wrapper. This could have made the gum not stick in the surface.

...read more.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics 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 International Baccalaureate Physics essays

  1. Current Balance

    Furthermore we can also find the magnetic field per ampere of current that passes through the solenoid. Looking back at previous notes, it is apparent that the current passing through the solenoid IB will also yield a graph that represents a slope passing through the origin, more specifically the slope

  2. THermal Physics Lab

    1800 1800 1800 Initial temperature (+ 1�C) 30 34 0 Final temperature (+ 1�C) 15 18 14 Total heat lost (J) -301600 + 51236 - 301600 + 51039 - Total heat energy gained - - 603200 + 102275 Conclusion: In this investigation a thermometer was used to measure the temperature of the hot milk and the hot

  1. Pendulum Lab

    Angle-The angle at which the bob was dropped can influence the velocity imparted from the force of gravity. The bob in each trial was dropped from a 40� angle, and due to the string length being constant, the amplitude from which the bob was dropped was constant.

  2. Design Lab, Charge on Balloons

    The wool cloth: The size and type of wool cloth has to be the same since the different wool structure might give different amount of charge to the balloon. The number of rubbings on the balloons: This is one important variable since the rubbings determine the charge conducted onto the balloons.

  1. Oscillating Mass

    Conversely, if k is decreased while keeping the mass of the object constant, then T will increase and the oscillations will occur less frequently. It is also clear from the formula that the relationship between T and m is not linear but exponential and my results should show this.

  2. Investigate the relationship between temperature and evaporation rate.

    Temperature of liquid after being dried (�C) � 0.1 2 minutes �0.1 4 minutes �0.1 6 minutes �0.1 Cool water 28.0 30.0 32.0 32.0 Boiling water 70.0 61.0 54.5 50.0 The results support my hypothesis which is the higher the temperature, the more temperature will be lost when heated (dried),

  1. memory Vs Time

    in this experiment, the cards doesn't need to be organized in a row and column, it should be all over around a certain area on the table, shouldn't be too part apart from each other, and shouldn't be too close too.

  2. Light Intensity Investigation

    For instance, the shape of our graph shows an inverse relationship between light intensity and distance. The power trend line displays this relationship as it shows that as the distance increase, the light intensity decreases through its angular line curving downwards from left to right.

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