2.- (10 puntos) Para el problema de valor inicial, muestre su solución usando la transformada de Laplace: LaTeX: y''+y=1-\delta (t-\pi ) \because y(0)=1 \because y' (0)=0

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

What is creep? what is stress relaxation?