A tank initially contains 250 gallons of fresh water. Water containing 9 grams of salt per gallon enters the tank at the rate of 10 gallons per minute, and the well mixed solution leaves the tank at the rate of 5 gallons per minute. The amount of salt in the tank after 6 minutes is a) 487.74 grams. b) 511.07 grams. c) 508.86 grams. d) 480.09 grams.

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)