What is the mechanical advantage of a 3/8” diameter screw with 20 threads per inch if a 1.5” diameter screwdriver is used to install the screw? Please show work. A. 94
B. 47
C. 118
D. 24

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?

What is a monomer? how do they form a ploymer from the view point of chemical bonding?

Write a technical essay (maximum two pages) about stress concentration. and paste from the textbook. instead, read updated material about this phenomenon and provide a technical evaluation of the different techniques to avoid/reduce such phenomenon. consider in your analysis cutting-edge computational techniques such as fea to study and analyze stress concentrations.