A shaft made of AISI 1020 cold-drawn steel rotates at 1600 rpm and transmits 8 HP. (a) Using the maximum shear stress theory, determine the minimum acceptable diameter of the shaft so that there is a factor of safety of 1:8. 1 (b) Suppose the shaft still transmits 8 HP, but now the shaft rotates at twice the original speed, i. e., at 3200 rpm. Before doing a calculation, can you speculate about whether the required minimum diameter would increase, decrease or stay the same

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

answer:

true

explanation: