ok...my engineering professor just gave us this crazy hw problem. he wants use to design a tool to measure the normal stress in a biological tissue. now it doesnt have to be extremely detailed in any way, but...we dont even know how normal stress is measured. the problem asks for it to measure 1000 dyn/cm^2 up to 1,000,000 dyn/cm^2. now...this is obviously impossible, and he said that. he just wants us to think about the design. so my question is....how does a tool measure normal stress?