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(^o)C -
B.
23.3(^o)C -
C.
49.0(^o)C -
D.
16.43(^o)C
Correct Answer: Option B
Explanation
(frac{49 – 0}{210 – 0}) = (frac{theta – 0}{100 – theta})
(frac{49}{210} = frac{theta}{100})
49 x 100 = 210 x (theta)
(theta = frac{4900}{210}) = 23.3(^o)
There is an explanation video available below.