A<span>. </span>
<span>the change in carbon dioxide levels in the atmosphere
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hope that's right and hope i helped
I believe the density p1 is greater than the density p2 .
Since the liquid are at equilibrium in the the open U-tube, the pressure at which the liquids meet should be the same. That is at the position where they are in contact, the pressure that liquid 1 exerts at that point is the same as the pressure exerted by liquid 2 at the point.
Not sure about 2 or 3 but I believe that for number 1 is B or claim 2!!
