## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

$v_2 > v_1 > v_3$
When the gas flows faster, the pressure is lower, and the liquid will rise up to a higher level. Point 2 has the highest level of the liquid, so the pressure must be the lowest. Therefore, $v_2$ is the fastest. Point 3 has the lowest level of the liquid, so the pressure must be the highest. Therefore, $v_3$ is the slowest. We can rank the gas speeds from largest to smallest: $v_2 > v_1 > v_3$