My team has finished an experiment to test which test tube's [when covered in black or white tape] water was the hottest. We covered one test tube in black electrical tape and one in white masking tape. We taped those to a ring stand. We put a thermometer in each test tube and then got a lamp. We plugged the lamp in and focused it on both test tubes evenly. We looked at the temperature of each test tube every 15 minutes. These are our results:
At time zero the water in the black tube was at: 26ºC
At time zero the water in the white tube was at: 25ºC
At time 15 mins the water in the black tube was at: 30ºC
At time 15 mins the water in the white tube was at: 26ºC
At time 30mins the water in the black tube was at: 34ºC
At time 15 mins the water in the black tube was at: 30ºC
At time 15 mins the water in the white tube was at: 26ºC
At time 30mins the water in the black tube was at: 34ºC
At time 30 mins the water in the white tube was at: 27ºC
1 comment:
This experiment is really interesting and it makes me wonder about choice of colour for absorbing heat. In our climate if our houses were painted dark colours would they absorb more of the sun's radiant energy in winter? Might we have trouble then if we wanted the house cool in summer? Maybe we could cover the house in a dark colour in winter and a light colour in summer. What do you think?
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