PROBLEM 2.1
A 2.2-m-long steel rod must not stretch more than 1.2 mm when it is subjected to a 8.5-kN tension force. Knowing that E = 200 GPa, determine (a) the smallest diameter rod that should be used, (b) the corresponding normal stress in the rod.
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A device that harnesses the power of wind by converting the pressure gradient force of the atmosphere into electricity is a(n) _______________
Fill in the blank(s) with the appropriate word(s).
The horse is able to sense the rider's security by the way the rider uses his or her:
A. reins B. hands C. voice D. legs
Why do acetylene cylinders contain acetone?
A) Acetone chemically reacts with the filler in the tank to produce acetylene gas. B) Acetylene gas is dissolved in the acetone liquid. C) Acetone helps keep the cylinder weight balanced by evenly distributing the liquid. D) The acetone liquid boils off to form acetylene gas.
Which of these components keep the brake shoes in position on the backing plate?
A. holddown springs B. return springs C. Both A and B are correct D. Neither A nor B is correct