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Explain why the modulus of elasticity of simple thermoplastic polymers, such as polyethylene and polystyrene, is expected to be low compared with that of metals and ceramics.
the position of an object is moving along an x axis is given by x3t - 4t2t3 where x is in meters and t is in
two l4 x 4 x 12-in. angles parallel to and on the x-axis are welded to either sides of a 10-in. high by 12-in. wide
a 180 degree elbow takes in water density water 1000 kgm3 at an average velocity of 1 ms at the horizontal inlet where
Determine metal removal rate, etching time, and required dimensions of the opening in the cut and peel maskant required to achieve the desired pocket size on the part.
a manufacturer makes 7900000 memory chips per year. each chip takes 0.4 minutes of direct labor at 8hr. the overhead
the 50-kg homogeneous smooth sphere rest on the 30 degree incline A and bears against the smooth vertical wall B. calculate the contact forces at A and B.
a horizontal aluminum rod 1 cm in diameter and 10 cm long has both ends maintained at 363 k. air at 293 k and 1 atm
a two stage crushing operation feeds 0.6m diamater ore into a primary crusher at a rate of 25 mthr. 75 of the ore feeds
What is the velocity and rate of flow of the metal into the mold? Is the flow turbulent or laminar? (Pure aluminum density ρ = 2.7 g/cm3).
If the bar is subjected to centric forces of magnitude P = 30 kN and knowing that EA = 70 GPa and EB = 105 GPa, determine the normal stress (a) in the aluminum layers, (b) in the brass layer.
Use the bisection method to determine the drag coefficient (cd) needed so that a 80 kg bunjee jumper has a velocity of 36 m/s after 4 s of free fall.
r-22 undergoes a process between two states. the process has an isentropic compressor efficiency of 80. at state 1 the
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