Hydraulics & Fluid Mechanics
In which of the following the friction drag is generally larger than pressure drag?

an airfoil
a cylinder
a sphere
a circular disc or plate held normal to flow

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Hydraulics & Fluid Mechanics
Choose the wrong statement

when in equilibrium, fluids cannot sustain tangential forces
when in equilibrium, fluids can sustain shear forces
fluids are capable of flowing
fluids conform to the shape of the con-taining vessels

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