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At a sudden contraction in a pipe the diameter changes from D1 to D2. The pressure drop, ?p, which develops across the contraction is a function of D1 and D2, as well as the velocity, V, in the larger pipe, the fluid density, ρ, and viscosity,µ. Use D1, V, and µ as repeating variables to determine a suitable set of dimensionless parameters. Why would it be incorrect to include the velocity in the smaller pipe as an additional variable?
h injection molding was portions of the part not filling. List and explain three process parameters that may aid in the correction of this error. What other errors might adjustments in these parameters help allay?
air initially at 1 atm and 500degr with a mass of 2.5 lb is contained within a closed rigid tank. the air is slowly
tom and jim are kicking a ball which has a mass of 490g back and forth. tom kicks the ball with a speed of 5ms
Determine the stress that would result in a 1in schedule 40 steel pipe if a plumber applies a force of 70lb at the end of a wrench handle that is 16in long. What is the equation for torque? What is the value of T in this problem? Include units. What ..
a 580 n uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal 6.00-m-long uniform 90-n
It is proposed to manufacture glass beads of 0.5mm by spraying them in 20 degree C air and allowing them to harden as they fall to the ground. Assume that the initial temp of the glass bead is 500 degrees C. The bead air heat coefficient h=324 W/m^2K..
a u-tube manometer is initially filled with water but exposed to a pressure difference such that the water level on the
If one material has a higher density than another, must the molecules of the first be heavier those of the second? Explain
calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.25 kg of liquid water at
in a brinell hardness test a 1500-kg load is pressed into a specimen using a 10-mm diameter hardened steel ball. the
a small household refrigerator is used to cool 20 liters of water initially at 22c. the cop of the refrigerator is 2.40
a structural lin that is 3 in. wide and 0.5 in. thick is to have a factor of safety of 2 relative to its yield strength
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