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Reducing unemployment.
Problem: Will cash bonuses speed the return to work of unemployed people? A state department of labor notes that last year 68% of people who filed claims for unemployment insurance found a new job within 15 weeks. As an experiment, the state offers $500 to people filing unemployment claims if they find a job within 15 weeks. The percent who do so increases to 77%.
Required:
Suggest some conditions that might make it easier or harder to find a job this year as opposed to last year. Confounding with these lurking variables makes it impossible to say whether the bonus really caused the increase.
Determine the natural frequency of torsional vibration of a 0.8m diameter disc mounted on a steel shaft of .04 m diameter and 2 m length
a box of mass m1= 5 kg. rests on a smooth horizontal floor next to a box mass m2= 10 kg. what is the acceleration of the boxes
The telescope at Yerkes Observatory in Wisconsin has an objective whose focal length is 19.4 m. Its eyepiece has a focal length of10.0 cm. What is the angular magnification of the telescope
A 62.3-kg skateboarder starts out with a speed of 2.22 m/s. He does 108 J of work on himself by pushing with his feet against the ground. How much has the vertical height of the skater changed
A resistor draws 12mW when placed acriss the terminals of a 1.5V battery, Determine the current drawn by the resistor
a block of mass m sliding on a frictionless table is attached to a horizontal string that passes through a tiny hole in
A world-class sprinter accelerates to his maximum speed in 4.0s. He then maintains this speed for the remainder of a 100m race, What is his average acceleration for the entire race
A battery of ? = 2.70 V and internal resistance R = 0.700 ? is driving a motor. The motor is lifting a 2.0 N mass at constant speed v = 0.50 m/s. Assuming no energy losses, find the current i in the circuit. Enter the lower current.
A charge of -0.510 micro coulombs exerts an upward 0.210 Newton force on an unknown charge that is .300m directly below it. What is the unknown charge direction and magnitude?
A car is normally capable of an acceleration of 3m/s2. If it is towing a trailer with half as much mass asthe car itself, what acceleration can it achieve?
The image behind a convex mirror (radius of curvature= 69 cm) is located 17 cm from the mirror. Where is the object located? What is the magnification of the mirror?
Two violins are supposed to be playing concert A, at 440 Hz [{\rm Hz}], What beat frequency do the violinists hear
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