Fluid Mechanics

Drag force is a function of________________?

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Drag force is a function of________________?

1. projected area of the body
2. mass density of the fluid
3. velocity of the body
The correct answer is ?
A. (1) and (2)
B. (1) and (3)
C. (2) and (3)
D. (1), (2) and (3)

If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?

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If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?

A. from reservoir A to reservoirs B and C
B. from reservoir B to reservoirs C and A
C. from reservoir C to reservoirs A and B
D. unpredictable

The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?

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The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?

A. 0.40 cm
B. 0.20 cm
C. 0.10 cm
D. 0.05 cm
Assume that boundary layer is entirely laminar