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JAMB Physics 1995 Question 23

Question 23

Temperature and Thermometers

A temperature scale has a lower fixed point of 40 mm and an upper fixed point of 200 mm. What is the reading on this scale when a thermometer reads 60 °C?

  1. A.33.3 mm
  2. B.36.0 mm
  3. C.96.0 mm
  4. D.136.0 mm
Show the answer and explanation

Answer: D (136.0 mm)

Explanation

60 °C is 60% of the way from 0 °C to 100 °C. The scale spans 160 mm, so the reading is 40 + 0.6 × 160 = 136 mm.