What affects the kinetic energy of a trolley?

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Daniel Cheetham - Science Biology

What affects the kinetic energy of a trolley?

Aim:
In this experiment I will be trying to find out the amount of starch that a potato chip has.

Pre-Test

Plan:
1.) Cut 10 potato chips to a size, around 4cm long. Then weigh each potato chip and put them into pairs and tie a piece of string around on potato chip in each pair but making sure the string isn’t tied too tight or too loosely around the chip.

2.) Now make five sugar concentrations and make one sugar solution at each different concentration: 0% sugar, 20% sugar, 40% sugar, 60% sugar and 80% sugar.

3.) Now place one pair of potato chips into each sugar solution.

4.) Leave the potato chips in the sugar solution for 24 hours.

5.) After 24 hours, re-weigh each potato chip and record it’s new weight.

6.) Using the weights now work out the averages for the potato chips.

Conclusion:
From these results I can now see that there isn’t a large net change in the sugar solution of o% and 20% concentration. So from this I can estimate that there won’t be much of a new change between 5% and 15% concentration but to show if this is true or not, we’ll have to narrow down the range in sugar solutions. Therefore, we’ll make the sugar solution range between 0% and 20% going up in increments of 5%. By doing this we’ll be able to find out where the point of no net change is. Also to make the results better we’ll use 3 potato chips instead of 2 this time, by doing this we’ll be able to get more accurate averages.

Plan

Prediction:
From the results of the pre-test I estimate that the sugar content will be a low percentage and is only around 5% or 6%.

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Variables:
Independent Variable:
In this experiment I will have only one independent variable, which I will change though out the experiment. The independent variable will be the sugar solution that the potatoes are placed in, I will first of all do a test to see what concentration
Dependent Variables: 
I’ll have several Dependent variables in this experiment to try and help keep it a fair test. The first one being that I’ll keep all the other variables the same (e.g. Mass). I’ll also make sure that I use all the same equipment (e.g. the same beakers) and the last dependent variable ...

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