Aworker is raising a 9.2-m-long ladder of mass 53 kg asshown.
knowing that a = 1.8m and that the force exerted bythe worker is
perpendicular to the ladder, determine (a)the forceexerted by the
worker, (b) the reaction at b.

1in2 processor chip can be modelled as an isothermal plane wall of silicon, isothermal on both sides. the power input to the bottom of the plane wall, or the processing power of the chip, often called the thermal design power (tdp), is 100w. assume the periphery is adiabatic. the silicon is 400 microns thick. the temperature at the junction, or in this case on the bottom of the isothermal plane wall, is 85°c. what is the top surface temperature, assuming that the only mode of heat transfer is conduction