Final answer:
Mercury-hoping thermometers are used to measure temperature because they use a material that expands or contracts when heated or cooled. They are accurate, reliable, and non-invasive.
Step-by-step explanation:
Mercury-hoping thermometers are used to measure the temperature of an object because they use a material, like mercury, that expands or contracts when heated or cooled. This expansion or contraction causes the length of the column in the thermometer to change, allowing for measurement of temperature.
Mercury thermometers are accurate, reliable, and non-invasive. They have been widely used in various applications for measuring temperature due to their precision and affordability.