Usha has a thermometer and a device to measure length precisely. - She takes a uniform rod of an unknown metal. Its temperature is 20 °C. Its length is 10 cm. - She records these, but forgets to record the time. She now immerses the rod in a vessel of water. - She heats the vessel of water on a stove. - After some time she observes the water and the rod have reached a temperature of 80 °C. Usha is given no other information. Which of the following questions can Usha answer by taking some measurements immediately?
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Answer:
because iron rod is a good conductor of heat.so,
Explanation:
rod is take the temperature 20 to 80 degrees
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