Question 20
A circular bottle with dimensions, in centimetres, is shown partially filled with water (figure 1).
The bottle is sealed and then turned upside down (figure 2). The height $h$, in centimetres, of the air in the upturned bottle is
The bottle is sealed and then turned upside down (figure 2). The height $h$, in centimetres, of the air in the upturned bottle is