A 1.0-m-tall vertical tube is filled with 20 °C water. A tuning fork vibrating at 564 Hz is held just over the top of the tube as the water is slowly drained from the bottom.
Part A
At what water heights, measured from the bottom of the tube, will there be a standing wave in the tube above the water? Express your answer numerically. If there is more than one answer, enter your answers in descending order separated by commas.