What is the angular velocity (in rad/s) of a body rotating at n r. p.m.?

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

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?