I really need some help here!

1. Describe the difference between a shell structure and a frame structure.
2. What is the difference between a static force and a dynamic force?

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.

Brief discuss how the presence of dislocations in crystal structures can be an advantage and a disadvantage to engineer and designers.