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problem1) Velocity profile for laminar flow in round pipe is given by the equation u(r)=umax[1−(r/R)2] where Umax is the centerline velocity, R is the pipe radius and r is the radial distance from the pipe centerline.

a) Determine the velocity gradient at the pipe wall? Note that normal distance from the pipe wall is y=R-r, thus dy=-dr and du/dy=-du/dr.

b) what is the shear stress at pipe centerline?

c) Demonstrate that the velocity gradient, and as the shear stress varies linearly from zero at the pipe centerline to a maximum at the pipe wall.

problem2) Determine the equal annual payment series that will be equivalent to the following increasing series of payments if the interest rate is 12%

(a) compounded annually;

(b) compounded continuously.

\$600 at the end of the first year
\$800 at the end of the second year
\$1,000 at the end of the third year
\$1,200 at the end of the fourth year
\$1,400 at the end of the fifth year
\$1,600 at the end of the sixth year
\$1,800 at the end of the seventh year

Mechanical Engineering, Engineering

• Category:- Mechanical Engineering
• Reference No.:- M93984

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