What element is not involved in Rømer's thermometer?
Mercury
Water
Ice
Steam
Answer
Mercury is not used in Rømer's thermometer. Rømer's thermometer, invented in 1701, utilized alcohol as its thermometric fluid. Alcohol was chosen due to its low freezing point and high boiling point, making it suitable for measuring a wide range of temperatures. Mercury, on the other hand, was not employed because its freezing point is too low for practical use in thermometers.
Stargazing Through Time: The Ole Rømer Astronomical Challenge
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