1D50.67 - Fluid in Rotating U Tube
Demonstrate forces that are velocity/radially dependent
Carefully push and twist the clear PVC vertical tubes into the bottom of the U tube assembly so that they are water tight. Align the central U arm over the center of the turntable and insert the two screws and tighten the nuts to secure the arm assembly (holding the U tube) to the turntable. Mix dye into 400 mL of water until it is quite dark. Carefully pour dye water into the U tube. Connect the power supply and the frequency meter to the turntable. Assure that both ends of the swinging arm have good clearance from the power supply and all other external objects.
One can either quickly or slowly accelerate the U tube into rotation. Make sure that you do not exceed the speed that will expell the dyed water from the end of the outer tube. Note that the inner central vertical tube water height drops and that the outer one rises. Given the frequency in Hz of the turntable and the rise/drop of the vertical water collumns one can calculate the forces involved.