. In testing a type of insulation, the temperature in a room was made to fall to 2/3 of the initial temperature after 1.0 h, to 2/5 of the initial temperature after 2.0 h, to 2/7 of the initial temperature after 3.0 h, and so on. If the initial temperature was 50.0 °C, what was the temperature after 12.0 h? (This is an illustration of a harmonic sequence).

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