You are traveling in an airplane. The engineer who designed it is, casually, on your side. He tells you that the wings were designed using the Tresca criterion. Would you feel
safer if he had told you that the von Mises criterion had been used? Why?

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.