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===Method===
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|[[File:RequiredPracticalThermalInsulation1.png|center|600px]]
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| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of the [[apparatus]] used in an [[experiment]] to compare the effectiveness of different [[Thermal Insulator|thermal insulators]].
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#Fill a can with hot [[water]] (above 80°C).
#Place a [[thermometer]] in the [[water]] and wait until the [[temperature]] reaches 80°C.