Neglect capillary effects. Which of the following statements about ideal manometers and barometers are correct?

Select all that apply

• Option A

  The vertical height of an ideal barometric column is independent of the tube cross-sectional area.

• Option B

  Tilting a barometer changes the length of the liquid column but not its vertical height for unchanged atmospheric pressure.

• Option C

  A barometer in an upward-accelerating elevator shows a smaller vertical column height if atmospheric pressure remains unchanged.

• Option D

  In a stationary U-tube containing one liquid and open to the same atmosphere at both ends, the two free surfaces are at the same horizontal level.