Question

why does fountain pen leaks at height​

Answer 1

Answer:

At a high altitude, the pressure in the atmosphere decreases making the gas pressure inside the ink cartridge relatively higher and this forces the ink to flow out until the pressure is equalised.

Answer 2

Explanation:

the pressure at high altitude is comparatively less so equalize the pressure difference ink start moving from the pen which has relatively high preassure .

hope it's helpful to you