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Hilda wanted to investigate the absorption of heat by three different types of fabric. The set-up for the investigation is shown.
Which would be the independent variable in her investigation?
O the temperature on the thermometer
O the time the blow dryer was used
O the type of material
O the type of blow dryer
Thermometer
Fabric
50
-45
40
55
****
0
3:
35 30
5
10
6 15-
20
25
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