Let's assume that using micro-machining processes, we can make a "hot-wire" sensor of lum in diameter and 5 um in length. If we use the nano-machining process, one can make a "hot - wire" sensor of 1 nm in diameter and 5 m in length. If the material properties in both cases are the same, you are asked to calculate the ratio of sensitivity for the two cases - please make all necessary other assumptions.