The Blades of metal cutter are shorter than that of blades of paper cutter scissor...Give reason

In order to cut the metals we need more energy and effort. If the effort distance is greater than load distance there will be magnification of force and the metals would easily could cut. So the blade of a metal cutter shorter than that of paper cutters.

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.