What are the two fixed points on Rømer's thermometer?
Melting ice and boiling ethanol
Boiling water and freezing water
Freezing nitrogen and boiling hydrogen
Condensing steam and melting lead
Answer
Boiling water and freezing water are the two fixed points on Rømer's thermometer. Rømer's thermometer is a temperature scale invented by Ole Rømer in 1701. It is based on the freezing and boiling points of water, which are assigned the values of 0 and 60 degrees, respectively. The scale is divided into 60 equal parts, with each part representing 1 degree Rømer.
Stargazing Through Time: The Ole Rømer Astronomical Challenge
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