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Does job training work? To measure the effectiveness of government training programs, it is usual to compare workers' pay before and after training. But many workers sign up for training when their pay drops or they are laid off. So the "before" pay is unusually low and the pay gain looks large.
(a) Is this bias or random error in measuring the effect of training on pay? Why?
(b) How would you measure the success of training programs?
In the figure, two particles, each with mass m = 0.79 kg,are fastened to each other, and to a rotation axis at O,by two thin rods, each with length d = 6.0 cm and massM = 1.2 kg. The combination rotates around the rotationaxis with angular speed ω = ..
When a battery is connected to a 1.75 ? resistor the current flow through the circuit is 0.810 A, Determine the internal resistance of the battery and the voltage supplied by the battery
If it starts 4.70m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 21.0N
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Calculate the acceleration of a bus that goes from 57.6 km/h to a speed of 99.79 km/h in 10 s
500 kg satellite moves in a circular orbit of 4.8 x 106 m above the surface of the earth. What is the orbital speed of the satellite
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A particle of charge +14 µC and mass 3.54 10-5 kg is released from rest in a region where there is a constant electric field of +490 N/C
A miniblack hole formed as a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (Assume that your mass is 50).
a hammer thrower accelerates the hammer mass 7.30 kg from rest within four full turns revolutions and releases it at a
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