Hi, can you help me to solve the following problem: A narrow, long and glass tube opened first at both ends is dipped up to the half of its length vertically into a beaker filled with water. With a finger the upper end of the glass tube is locked and the entire glass tube is pulled from the water. Then the glass tube is turned slowly - to give without the opening locked with the finger freely - around 180° around a horizontal axle. Determine the length of the air column included in the glass tube. The glass tube is 1 m long and the outside air pressure amounts to 105 kPa.