A120 kg machine is mounted on a spring of stiffness 7.68x10 n/m with no viscous damping. the machine is subject to a harmonic excitation force. at what excitation frequency will the response of the system have an unbounded growth of amplitude?

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

What are the major differences between injection molding and extrusion?