Physics - Fluid Question with Solution | TestHub

The uncut tube would support a 16.3 cm water column.

At the shortened end, the meniscus becomes less curved to balance a 12 cm column.

$$h_1{R}_1=h_2{R}_2$$

$$R_2=\frac{h_1}{h_2}{R}_1=\frac{16.3}{12}{R}_1$$

The larger radius reduces the capillary pressure. The water stays at the tube top without overflowing (B).