State whether the following statements are True or False:
$(i)$ The Bernoulli equation can be considered to be a statement of the conservation of energy.
$(ii)$ The angle of contact between a drop of water and the material of a raincoat is an acute angle.
$(iii)$ The absence of roughness between two consecutive layers of fluid is the definition of viscosity.

(N/A) $(i)$ True. The Bernoulli equation is derived from the work-energy theorem,representing the conservation of energy for an incompressible,non-viscous,and steady flow of fluid.
$(ii)$ False. Raincoats are made of hydrophobic materials to repel water. The angle of contact between water and a hydrophobic surface is an obtuse angle (greater than $90^{\circ}$),which prevents the water from wetting the fabric.
$(iii)$ False. Viscosity is actually the measure of the internal friction or resistance to flow between adjacent layers of a fluid moving at different velocities. It is the presence of internal friction,not its absence,that defines viscosity.