The Lower And Upper Fixed Points Marked On A Mercury-in-glass Thermometer Are 210mm Apart. The End Of The Mercury Column In The Tube Is 49mm Above The Lower Fixed Point In A Room. What Is The Temperature Of The Room In Degrees Celsius?

A. 55.3°C
B. 23.3°C
C. 49.0°C
D. 16.43°C

Correct Answer:

Option B = 23.3°C

Explanation

⁴⁹⁻⁰/₂₁₀₋₀ = ^θ−0/_100−θ

⁴⁹/₂₁₀=^θ/₁₀₀

49 x 100 = 210 x θ

Θ = ⁴⁹⁰⁰/₂₁₀ = 23.3^o

The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?