Three identical fatigue specimens (denoted a, b, and c) are fabricated from a nonferrous alloy. each is subjected to one of the maximum-minimum stress cycles listed below; the frequency is the same for all three tests.
specimen σmax (mpa) σmin (mpa)
a 460 -360
b 410 -310
c 350 -350
rank the fatigue lifetimes of these three specimens from the longest to the shortest.

Im pretty sure its b but please dont yell at me if you got it wrong

I tried my best

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only