Hello all, Should be a simple question (just started Physics 1 not long ago). Here it is: The thin, fluid filled glass tube is sitting on an accelerating cart. As a result the level of the fluid rises as shown in the picture (attached) by D = 0.6 m. The distance L is given. L = 0.2 m. Acceleration due to gravity is assumed to be 10. Question: What is the acceleration a? I was told to use the law of communicating vessels (very little information in English is found online on this subject) and "the effective vector g" (no idea what that means). Very flustered by this, any help or a nudge in the right direction is appreciated. Thank you!