Please help

What are saving bonds?

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

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?