Question

Explain why a fluid flowing out of a small hole in a vessel results in a backward thrust on the vessel

Answer 1

Brewster's angle is an angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection. When unpolarized light is incident at this angle, the light that is reflected from the surface is therefore perfectly polarized. 

Answer 2

Hey mate,

◆ Answer-
- According to equation of continuity (area × velocity = constant), fluid flowing out of small hole acquires large velocity.
- This large velocity results in larger momentum.
- As there are no external forces acting here, the system follows law of conservation of momentum which leads to backward thrust on the vessel.

Hope that was useful...