The secondary stage creep behavior of a high temperature steel at 538°C is given by: έ = 1.16 x 10-24 σ8 where έ = strain rate in h-1 and σ = stress in MPa. Predict the creep rate of this steel at a temperature of 500°C at a stress level of 150 MPa. The activation energy for creep is given as 100kcal/mol.

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