The lower and upper fixed points marked on a Me... - JAMB Physics 2020 Question
The lower and upper fixed points marked on a Mercury-in-glass thermometer are 210mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?
A
55.3\(^o\)C
B
30.43\(^o\)C
C
49.0\(^o\)C
D
16.43\(^o\)C
correct option: b
\(\frac{49 - 0}{210 - 49}\) = \(\frac{\theta - 0}{100 - \theta}\)
\(\frac{49}{161} = \frac{\theta}{100}\)
49 x 100 = 161 x \(\theta\)
\(\theta = \frac{4900}{161}\) = 30.43\(^o\)
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