Chapter 1, Problem 1.4E

Cohesion happens between all molecules in a liquid, but because the molecules in the middle of the droplet pull each equally in all directions they generally cancel each out. This strong inward force causing molecules on the surface to contract and resist being pulled apart. This is known as surface tension.  Based on this information. Answer the question .

Four solid metal balls fit snugly inside a cylindrical can. A geometrystudent claims that two extra balls of the same size can be put into the can. provided all six balls can be melted and the molten liquidpoured into the can. Is the student correct? (Hinr. Let the radius ofeach ball be r.)