A tensile test specimen begins to neck at a true strain = 0.20 and true stress = 244 MPa. Without knowing any more about the test, determine the strength coefficient and the strain-hardening exponent in the flow curve equation?

How can waves travel through ground?

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d