Asimple undamped spring-mass system is set into motion from rest by giving it an initial velocity of 100 mm/s. it oscillates with a maximum amplitude of 10 mm. what is its natural frequency?

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

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Burgers vector is generally parallel to the dislocation line. a)-true b)-false