help me with some manometers here please.

The fluid in a manometer tube is 40% water and 60% alcohol (specific gravity = 0.8). What is the manometer fluid height difference if a 50kPa pressure difference is applied across the two ends of manometer?

Question

help me with some manometers here please. 

The fluid in a manometer tube is 40% water and 60% alcohol (specific gravity = 0.8). What is the manometer fluid height difference if a 50kPa pressure difference is applied across the two ends of manometer?

anonymous · Answer

I think alcohol and water are miscible (never tried though!). So we have to use average density of liquid.

anonymous · Answer

that is what I am thinking as well. but my classmates insist that there is a height difference here and we can assume the two fluids to be immiscible.

anonymous · Answer

if they are miscible, their height will be the same at both sides right?

anonymous · Answer

It would be complicated if they were immiscible. Also in that case we will have to know on which side pressure was applied - where there is alcohol on top or where there is water on top.

anonymous · Answer

we can say that the water is going to at the bottom since the water is more dense than alcohol right?

anonymous · Answer

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