Question

The distance between the fixed point of a Celsius thermometer is20cm. what is the temperature when the mercury level is 4.5cm above the lower mark?​

Answer 1

22.5°C

Step-by-step explanation:

Given height of Celsius thermometer is 20 cm.

As we know the limit of a Celsius thermometer is 100°C

It is given that total height of thermometer is 20 cm.

So, this limit that is 100°C should be equal to 20 cm.

`20\ cm\ =\ 100`°C

`1\ cm\ =\ (100)/(20)`°C

`1\ cm\ =\ 5`°C

Now, we want to find the temperature when the level of mercury was 4.5 cm.

`4.5\ cm\ =\ 5* 4.5`°C

`4.5\ cm\ =\ 22.5`°C

Hence, we have 22.5°C temperature in Celsius thermometer when height of mercury is 4.5 cm above the lower mark.