The lower and upper fixed points marked on a mecury-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.
55.3oC -
B.
23.3oC -
C.
49.0oC -
D.
16.1oC -
E.
76.7oC
Correct Answer: Option B
Explanation
210mm …. 100oC
49mm …. (theta)
0mm …. 0oC
(frac{49 – 0}{210 – 0}) = (frac{theta – 0}{100 – 0})
(frac{49}{210}) = (frac{theta}{100})
(theta) = 23.3oC