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An Experiment to Investigate How Insulation Thickness Effects the Temperature Drop of Water

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Introduction

An Experiment to I nvestigate How Insulation Thickness Effects the Temperature Drop of Water What have you found out? I have concluded from the results that as the layers of insulation are added, increasing the thickness of the insulation the average temperature drops more slowly. Are there any patterns in your results? The average temeperature drop when there has been no layers added and the thickness is zero is the greatest, from then on the average drop declines in relation to the number of layers and thickness increasing. The decline in the average temperature drop from 0 layers (Omm) to 1 layer (2.8 mm) is the greatest and from there, it seems to be more gradual in decline. Show how you know about these patterns? The patterns are shown clearly on the graph as the line is declining. I have drawn a line to represent the gradient on the graph; it shows that from 0mm to 2.8mm there is a dramatic decline in the average temperature drop as the gradient is very steep. The gradient between 2.8mm and 4.6mm is only slight which shows the average temperature drop when another layer was added was not as a dramatic decline. From then on, as each layer is added, increasing the thickness the decline in the average temperature drop is not as dramatic which is shown from the graph gradient, which is showing a constant decline. ...read more.

Middle

the sun's rays travel through the vacuum of space to Earth through Wave motion. This experiment was conducted with a black can, presuming the can is painted black inside means that it absorbed the warmth of the water through radiation waves into the walls. If black was the colour inside the can it quickened the process of heat loss whereas if the can had been sliver inside it would reflect the radiation waves back to the water prolonging the heat contained. If you were to continue the investigation would the patterns continue? If I was to continue with the investigation I think judging from the graph the patterns will continue to a point until it levels off. Past a certain amount of layers there will be no decrease in the temperature drop as the water will reach the point were an extra layer makes no difference. This is because the water will have reached the maximum point were the average temperature drop will not change as the can not retain any more heat than it was already.. EVALUATION How good is the experiment? The experiment shows an approximately clear rate on how insulation effects the temperature drop on water. The experiment was done more than once on each layer to provide a more accurate average and precautions such as measuring the thickness of the bubble wrap so it would always be the same size tried to ensure that the experiment was fair. ...read more.

Conclusion

I think the results have allowed me to make a firm conclusion because they have produced the patterns I expected. They may be slightly inaccurate here and there but these inaccuracies do not effect the experiment to the extent all the results are abnormal. If you were to repeat this experiment what would you change and why? As an improvement to my experiment I could have used a clamp, boss and stand to place the thermometer accurately especially when there isn't a lid to support it to stop any inaccuracies caused by this. Perhaps it would also be a good idea if the bubble wrap were made marginally thicker before it was wrapped around the can as when it is compressed it will become smaller and go to the correct size. I also think a note of the room temperature should be made just to be aware of an outside factor that may effect the results. How could you extend this investigation? I could change the material of the can to see if it affects the rate of which heat is transferred and I could also change the insulation properties by using cling fling or cotton wool to see what difference they make to the temperature loss. You could keep adding layers to see the point were it makes no difference. In addition, you could investigate the experiment without the plastic lid to see the difference the loss of heat through convection currents throughout the experiment changes the results. . ...read more.

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