Fill in the blanks:
$(i)$ The surface tension of water at critical temperature is ......
$(ii)$ Bernoulli's equation is based on the conservation of ......
$(iii)$ The energy would be ...... if $1$ large drop of water splits into $8$ small drops of water.
$(iv)$ When strong wind passes over a building,the force acting on the building is in the ......

(A) $(i)$ At the critical temperature,the interface between liquid and vapor disappears,so the surface tension is $0$.
$(ii)$ Bernoulli's equation is derived from the work-energy theorem,which is based on the law of conservation of energy.
$(iii)$ When a large drop splits into smaller drops,the total surface area increases. Since surface energy is proportional to surface area $(U = T \cdot A)$,the energy is absorbed (or the system requires energy),but in the context of surface tension problems,splitting a drop increases the surface energy,meaning energy is absorbed. However,if the question implies the change in energy,it is positive (absorbed).
$(iv)$ According to Bernoulli's principle,high wind speed over the roof creates low pressure,resulting in an upward lift force.