1-7E The weight of a man on earth is given. His weight on the moon is to be determined.
Analysis Applying Newton's second law to the weight force gives lbm 5.210lbf 1ft/slbm 174.32ft/s 10.32lbf 21022=⎟⎟⎠⎞⎜⎜⎝⎛⋅==⎯→⎯=gWmmgW
Mass is invariant andthe man will have the same mass on the moon. Then, his weight on the moon will be
lbf 35.8=⎟⎠⎞⎜⎝⎛⋅==22ft/slbm 174.
1.Shewhart’s two types of variation: common and special causes are also called natural and assignable variation.
2.A process is said to be operating in statistical control when the only source of variation is natural or common causes.
3.The x-bar chart indicates whether changes have occurred in the central tendency of a process; the R-chart indicates whether a gain or a loss in uniformity has o
the vicinity of Portal Drawbridge, which began shortly before 3:30 p.m. The fire damaged signals in the bridge area, forcing the suspension of train service at one point for a period of 1 hour 30 minutes and resulting in congestion and extensive delays for the next several hours.
Permanent repairs were made over the weekend. Thank you for your patience andunderstanding.
1. When did the fire st
1. I is directly proportional to V and will change the same percentage as V.
(a) I = 3(1 A) = 3 A
(b) I = 1 A (0.8)(1 A) = 1 A 0.8 A = 0.2 A
(c) I = 1 A + (0.5)(1 A) = 1 A + 0.5 A = 1.5 A
2. (a) When the resistance doubles, the current is halved from 100 mA to 50 mA.
(b) When the resistance is reduced by 30%, the current increases from 100 mA to
I = V/0.7R = 1.429(V/R) = (1.42