Theory of Machine
Sensitiveness of the governor is defined as the ratio of the

Difference of the maximum and minimum equilibrium speeds to the mean speed
Sum of the maximum and minimum equilibrium speeds to the mean speed
Mean speed to the minimum equilibrium speed
Mean speed to the maximum equilibrium speed

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Theory of Machine
Open pairs are those which have

Two elements that permit relative motion
Point or line contact between the two elements when in motion
Surface contact between the two elements when in motion
Elements of pairs not held together mechanically

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