Answer: coefficients of linear expansion.
- A densities
- B coefficients of linear expansion
- C specific heats
- D magnetic properties
Correct answer: B. coefficients of linear expansion
Explanation: Different linear expansion coefficients cause unequal expansion, bending the strip toward the metal that expands less.
During a phase change (melting or boiling), temperature stays constant while heat is absorbed entirely as latent heat (Q=mL); temperature only rises again once the substance is fully in its new phase.
Concept context
Temperature scales, thermal expansion, calorimetry, and the three modes of heat transfer including radiation laws.