Knowing a .02 in gap exists when the temperature is 75 degrees f, determine

(a) the temperature at which the normal stress in the aluminum bar will be equal to -11ksi,
(b) the corresponding exact length of the aluminum bar.

bronze aluminum
a = 2.4 in^2 a=2.8 in^2
e=15x10^6 psi e=10.6x10^6
alph=12x10^-6/f alpha=12.9x^-6/f
l=14in l=18in

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.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

A5 kg block of fe is dropped into a very large vat of water. the fe and water initial temperatures are 95 and 25 c, respectively. the fe final temperature is 25 c and the water can be treated as a thermal reservoir,. treated as a thermal reservoir take the water to be the system and determine the entropy generation. report vour answer in kj/k.