What will happen if the density of an object is less than the density of water?

The object  will float on the surface of water if its density is less than the equal volume of water.

Explanation:

Density:

It is define as mass per unit volume.

d=m/v

it is mostly measure in g/mL

it is represented by ρ (rho)

The density of water is one gram per cubic centimeter. If the object is less denser than water it will float. If the density of object is greater than the density of water it will sink.

Other examples:

some rocks are more denser then water so they will sink in it.

density of oil is less than vinegar, so it will float on the surface of vinegar

they are made of gases.

they have a spherical shape.

they make energy through fusion.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.