If you are pouring heavy pan cake syrup on your pancake, and as the syrup spread

Question

If you are pouring heavy pan cake syrup on your pancake, and as the syrup spreads over the pancake, what flow would the thin film of the syrup be?

Laminar

Turbulent

Can not be determined

Which of the following statement is NOT true

Friction always exists on a moving object surface through a fluid

Pressure drag has a smaller absolute value compared to the friction drag.

Flow separation along a moving blunt body is the cause for pressure drag

A golf ball has dimples to increase its flight distance as a result of the reduced wake region.

Shortfin mako sharks can shoot through the ocean at up to 46 mph (20.4 m/s)! their typical body length is about 2 m. in the ocean water of a viscosity of 1.05 x 10^-6 m^2/s. is the boundary layer developed along the smooth skin surface of Mako Shark?

No

Yes

Cannot be determined

When a Newtonian fluid flows under steady, fully developed laminar condition through a circular pipe of constant diameter, which of the following is NOT a correct conclusion?

The shear stress at the center of the pipe is zero.

Fluid particles move in straight lines.

The velocity will decrease along the length of the pipe.

The velocity profile inside the pipe is parabolic.

The hydraulic diameter of a circular sewer diameter , D, flowing half-full is equal to

Half its diameter, D

Its diameter, D

Double its diameter, D

Pi times its diameter

There are two Pitot-tube, one measures the velocity of air Va and the other one measures the velocity of water Vw. Both use the air-water manometer. It

Explanation / Answer

1.cannot be determined

2. Pressure drag has a smaller absolute value compared to the friction drag.

3. yes

4. The velocity will decrease along the length of the pipe.

5. half its diameter

6. va = vw

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