____ means the design is useful to a wide range of people with different abilities.
A. Flexible
B. Perceptible
C. Equitable
D. Intuitive
Answer: C
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Beside maintaining pressure on the contacts for current carrying capacity, the pressure springs have a second important function. This is to ____.
A. keep the contacts in line B. help obtain equal contacts against the stationary contacts C. slow down the pull of the armature into place to reduce the noise D. increase the power required to close the contacts
According to Newton's second law, the ____ of an object is equal to the force imparted on an object divided by its mass.
A. position B. momentum C. acceleration D. velocity
Carbon dioxide is used in arc welding as a(n) _____
A) shielding gas B) cutting gas C) cooling gas D) oxyfuel
Problem 1.7
Each of the four vertical links has an 8 × 36-mm uniform rectangu¬lar cross section, and each of the four pins has a 16-mm diameter. Determine the maximum value of the average normal stress in the links connecting (a) points B and D, (b) points C and E.