Fluid Dynamics Pressure Difference

[SNOOTCHIEBOOCHEE]

if you are given that a pressure displaces an oil (density = .85g/cc) 25mm in a contraption that looks like a long u shaped test tube, how would you find the realitve pressure difference?

 

[OlderDan]

if you are given that a pressure displaces an oil (density = .85g/cc) 25mm in a contraption that looks like a long u shaped test tube, how would you find the realitve pressure difference?

I'd probably try to figure out the weight of the on the high side that was higher then the oil on the low side, and divide that by the area of the base of the column of oil