The diagram below shows a six’s maximum/ minimum thermometer. a)What is the thermometric liquid in this thermometer? b)Why is it necessary for the vapour in bulb B...

The diagram below shows a six’s maximum/ minimum thermometer.
)What is the thermometric liquid in this thermometer?
b)Why is it necessary for the vapour in bulb B to be saturated?
c)Explain how the thermometer indicates maximum and minimum temperature.
d)Indicate on the diagram the two points where the reading of the temperature shown by the
thermometer can be made.

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a) Alcohol
b) So that the thermometric liquid does not vapourise
c) When the temperature rises, bulb A expands pushing the mercury down on that side which in turn pushes the index up on the other side so that maximum temperature is recorded
When temperature goes down the vapour pressure in bulb B pushed the alcohol above the mercury down which in turn pushes the mercury down. The index is left at the maximum point it had reached. The index on the other side is now pushed up and will be left at the highest point (minimum) when the situation reverses
d)

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Kavungya answered the question on October 17, 2019 at 10:15

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