1- A Newtonian fluid is defined as the fluid which a) is incompressible and non-viscous b) obeys Newton's law of viscosity c) is high viscous 2- The hydrostatic law states that rate of increase of pressure in a vertical direction is equal to d) is compressible and non-viscous a) Density of the fluid b) specific weight of the flwid c) weight of the fluid d) none of the above 3- Fluid statics deals with a) Viscous and pressure forces b) viscous and gravity forces c) gravity and pressure forces d) surface tension and gravity forces 4- Gage pressure at a point is equal to a) Absolute pressure plus atmospheric pressure b) Absolute pressure minus atmospheric pressure c) vacuum pressure plus atmospheric pressure d) none of the above 5- The resultant hydrostatic force acts through a point known as a) Center of gravity b) center of buoyancy c) center of pressure d) none of the above 6- For a floating body, the buoyant force passes through the a) Center of gravity of the body b) center of gravity of the submerged part of the body c) metacenter of the body d) centroid of the liquid displaced by the body 7- The specific gravity of a fluid having viscosity 0.05 poise and kinematic viscosity 0.035*10 m2/sec is a) 1.23 b) 1.43 c)1.53 d) none of the above 8- Vacuum pressure is defined as a) The pressure above the atmospheric pressure atmospheric pressure c) The pressure equal the atmospheric pressure b) The pressure below the energy d) none of the above

I was wondering in the hydrodynamics how i can determine Cp in the pressure ressistance (coefficient pressure). so the total ressistance will be Rt= Rf+Rp. Given in Coefficients it will be: Ct=Cf+Cp now they say Cp in % of the friction coefficient (Cf). Ct=(1+k)*Cf with 1+k the formfactor. so the total ressistance will be Ct=Cd*1/2*ρ *v^2*S (wetted area m^2, v= velocity in m/s and ρ= 1025 kg/m3 for salt water) kan you explain me how to calculate the Cd in the total resisstance?

For fluid undergoing circular motion, the centripetal force is provided by a pressure difference. Consider a fluid element (density p) at radial distance r, which has thickness dr in the radial direction and surface area dA normal to the radial direction. The pressure difference gives rise to a force on the fluid element equal to (p(r + dr) – p(r))dA. (i) Equating the pressure difference to the centripetal force, find an expression for the radial pressure gradient in terms of p, r, and fluid velocity v. (ii) A fluid is undergoing body rotation in the r-0 plane (cylindrical polar co-ordinates). By considering the gravitational pressure head, show that the shape of a free surface z(r) is parabolic. (iii) Find and sketch a similar expression for the free surface of a fluid vortex produced by a rotating cylindrical spindle (i.e. a solid cylindrical rod) of radius Ro.