AP BIOLOGY

Detailed explanation-1: -Surface tension in water owes to the fact that water molecules attract one another, as each molecule forms a bond with the ones in its vicinity.

Detailed explanation-2: -Surface tension and the buoyancy force are both working together to keep the object to keep floating. Surface tension keeps light object from falling into the water; buoyancy pulls up the object.

Detailed explanation-3: -Cohesive forces are responsible for surface tension, a phenomenon that results in the tendency of a liquid’s surface to resist rupture when placed under tension or stress.

Detailed explanation-4: -How does it work? For a dense object to float on water, the force exerted on the object from surface tension must be bigger than the force of gravity pulling it down. Here the force of gravity on the sphere is given by the volume of the sphere times its density times the acceleration of gravity.