The difference between the freezing and boiling points vary from substance to substance.
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Daniel Gabriel Fahrenheit (1686-1736) was a German physicist who proposed the funny Fahrenheit temperature scale in 1724. The freezing point of water is 32 degrees Fahrenheit and the boiling point is 212 degrees Fahrenheit. That is placing the boiling and freezing points of water strange 180 degrees apart. On the other hand we got the Celsius scale: there the freezing and boiling points of water are exactly 100 degrees apart. The freezing point of water is 0 degree Celsius and the boiling point is 100 degrees Celsius. Fahrenheit based his scale on the lowest temperature he could achieve with a salt-water "slurpie", the melting point of snow, and normal body temperature. He dealt primarily with meteorlogical temperatures and was not even interested in temperatures as high as boiling water.
0°C = 32°F (water's freezing point) 100°C = 212°F (water's boiling point) 37°C = 98.6°F (human body temperature)
A "degree" on the Celsius scale is larger than a "degree" on the Fahrenheit scale. There are 100 equal intervals (degrees) between 0 °C and 100 °C, the freezing and boiling points of water. There are 180 equal intervals between those same temperatures on the Fahrenheit scale (32 °F and 212 °F). That makes each Celsius degree 1.8 times as large (wide) an interval as the Fahrenheit degree. This is the basis for the "9/5" an "5/9" fractions in the conversion formulas (9/5 = 1.8). Some conversion formulas omit the fractions in favor of multiplying or dividing by 1.8, which is a single step. (see related questions)
1 Celsius degree.A Celsius degree is 1/100 of the difference between the melting and boiling points of pure water whereas a degree Fahrenheit is 1/180 of the same range.
Rose's metal is a fusible alloy and thus does not have a boiling point. Its melting point however is between 200 and 208 degrees Fahrenheit.