The tensile strength data for for two polymer samples are given below:

mn(g/mol) uts(mpa)
40,000 87
60,000 133
8 156
1 170

estimate the tensile strength
a) at mn of 76,000 g/mol and
b) mn of 129,000 g/mol.
can you use this method to determine the strength at mn of 400,000 g/mol? if not, why not?

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.