Question

3. Why are digital thermometers preferred to mercury thermometer?
How will you show that water is a poor conductor of heat?​

Answer 1

Answer:

Digital thermometers provide faster results.

Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.

Let us take some pure water in a test tube and dip a piece of wax in it after wrapping it in wire Then we hold the test tube in an inclined position and start heating water in the upper part of the tube we will observe that wax does not melt even when the upper part of water starts boiling Thus we can conclude that water being a poor conductor of heat is unable to melt the wax

Explanation:

hope it helps you Mark me as the BRAINLIEST and send some thank AS much u can PLZZ ❤️

Answer 2

Explanation:

Most metals are good conductors of heat and they are solids at room temperature. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer.