How Different Colors Radiate Heat

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Aim: To compare how different colours radiate heat. Hypothesis: The hypothesis is that the black can will radiate the least heat meaning that the temperature within the can will stay the highest, while the exterior temperature will be the lowest, with the silver can radiating the most heat and the white can being somewhere in between. Independent Variable: Colour of Aluminium can Dependent Variable: Temperature of water surrounding can after a period of time. Control Variables (at least 3 plus how they are controlled): Time the water is kept in the cans, amount of water, size and material of cans These variables will all be controlled. The time that the water is kept in the can will be controlled by using a stopwatch to time it.…show more content…
The can may also have sharp rims, which could be dangerous, but if caution is taken this risk can be avoided. Results: How Different Cans Radiate Heat over Time Based on Colour (Measured by interior and exterior water temperature) Time (minutes) Temperature inside Silver Can (°C) Temperature outside of Silver Can (°C) Temperature inside Black Can (°C) Temperature outside of Black Can (°C) Temperature inside White Can (°C) Temperature outside of White Can (°C) 0 80 19 80 18 80 18 2 41 23 52 20 44 23 4 39 26 46 22 39 25 6 35.5 27 45 24 37 26.5 8 38 28 43 24.5 34 27 10 33 29 40 25 32 27 Discussion: The results accept the hypothesis and show that the Black can is the least efficient at radiating heat, with a starting exterior temperature of 18°C and a concluding exterior temperature of 25°C (difference of 7°C). While the silver can (most efficient at radiating heat) started with an exterior temperature of 19°C and ended with an exterior temperature of 29°C (difference of 10°C). The white can was in between the two other cans starting with an exterior temperature of 18°C and finishing at 27°C (difference of 9°C). The black, silver and white cans all started with an interior temperature of 80°C but concluded with interior temperatures of 40°C, 33°C and 32°C respectively. At any given point in the experiment you could view the results and have them reflect the final result, there was no great fluctuation in the heat transfer, it remained consistent throughout the

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