Which of the following BEST represents the causes of stiff muscles? A.
Stiff muscles only result from overwork.
B.
Stiff muscles only result from prolonged periods of inactivity.
C.
Stiff muscles result from both over- and underworking them.
D.
Stiff muscles are mostly the result of painful injuries.

Fluids at rest possess no flow energy. a)- true b)- false

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false