Why does liquid curve at the top in a graduated cylinder?
It is due to surface tension. Which is the “fight” between the forces of the solid (graduated cylinder) and the surrounding gas (air). On the liquid in the cylinder. This fight can be positive, negative or zero. Water on glass, is negative. As in the water level is higher along the edges than it is in the center. Whereas mercury on glass is positive. The center is the highest point. A zero example is rare as in silver and water.
