Problem 1 (6 points) A rotating shaft of 25-mm diameter is simply supported by bearing reaction forces R1 = 4333N and R2 = 8667N. The shaft is loaded with a transverse load of 13 kN as shown in the figure. The shaft is made from AISI 1045 hot-rolled steel (Sy = 310MPa and Sut = 570MPa) and the surface has been machined. The strength at 106 cycles is 192.2MPa and the strength at 103 cycles is Sm = 484.5MPa. 

Problem 3, Part 3d of 3 What is the safety factor for infinite life?

Problem 2, Part 1 of 3 What is the fatigue stress concentration factor?

Problem 2, Part 2a of 3 What is the distortion energy for the alternating components in units of MPa?

Question 1, Part 3b of 3: What is the safety factor for fatigue failure?

In order to receive credit for this exam, you must upload a clear picture(s) of your work.   Number your problems/work.

What size film is commonly used for a bisecting angle survey?

Build a 95% confidence interval for the effect of age on “perceived seriousness of climate change” and interpret its meaning. 

Using the 5% significance level, test the null hypothesis that the average likelihood of turnout out to vote for white males is 80%. Do you accept or reject this null hypothesis? Explain your reasoning. 

Interpret the intercept, the coefficient for ideology, and the coefficient for female