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JAMB Physics 2005 Question 48

Question 48

Thermal Expansion

When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks because

  1. A.of the even expansion of glass.
  2. B.glass is a good conductor of heat.
  3. C.of the uneven expansion of glass.
  4. D.glass is a crystal.
Show the answer and explanation

Answer: C (of the uneven expansion of glass.)

Explanation

Glass conducts heat poorly, so the inside of the thick glass expands before the outside warms; this uneven expansion cracks it.