question_answer

Two thermometers are constructed in the same way except that one has a spherical bulb and the other an elongated cylindrical bulb. Which of the two will respond quickly to temperature changes?

Answer:

                A cylindrical bulb has a greater surface area than a spherical bulb of the same volume. Hence the thermo- meter with elongated bulb will respond to temperature changes more quickly than the one with a spherical bulb.