Given the project as shown in the table below:

Activity Predecessor(s) Normal Crash Normal Crash
Time (Weeks) Time Cost ($) Cost ($)
A - 4 2 4500 6600
B - 7 4 12000 18000
C A 2 1 6000 8000
D A 6 4 5250 8000
E B 5 3 7125 11000
F C 3 2 3000 4000
G D 2 1 6000 8000
H D, F 4 2 5250 7500
I E, G 4 2 4500 8500
J E 3 1 7500 14000

What is the cost of crash per week for activity C?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.