January 16, 2018
###### Consider a circular cylindrical solenoid of finite length L, radius a, with N turns of wire carrying current I0. The current may be approximated by a surface current density K⃗ = N I 0 / L φˆ .
January 16, 2018

An electronics company makes communications devices for military contracts. The company just completed two contracts. The navy contract was for 2,200 devices and took 27 workers two weeks (40 hours per week) to complete. The army contract was for 5,454 devices that were produced by 35 workers in three weeks.

 a. Calculate the productivity for navy and army contracts in units produced per labor hour. (Round your answers to 2 decimal places.)
 Contract Productivity Navy Army
b.On which contract were the workers more productive?
 Navy contract Army contract
 Live Trap Corporation received the data below for its rodent cage production unit.
 OUTPUT INPUT 50,050 cages Production time 635 labor hours Sales price: \$2.90 per unit Wages \$ 6.90 per hour Raw materials (total cost) \$ 30,000 Component parts (total cost) \$ 15,350
 Find the total productivity. (Do not round intermediate calculations. Round your answers to 2 decimal places.)
 Total Productivity Units sold per dollar input Sales \$ per dollar input

Omega Technology is starting production of a new supercomputer for use in large research universities. They have just completed the first unit, which took 150 man-hours to produce. Based on their experience, they estimate their learning percentage to be 83 percent.

 How many man-hours should they expect the second unit to require to manufacture? (Round your answer to 1 decimal place.)
 Expected man hours

A retail store had sales of \$45,650 in April and \$55,215 in May. The store employs eight full-time workers who work a 40-hour week. In April the store also had six part-time workers at 11 hours per week, and in May the store had eight part-timers at 18 hours per week (assume four weeks in each month).

 Using sales dollars as the measure of output, what is the percentage change in productivity (dollars output per labor hour) from April to May? (Round your intermediate calculations and final answer to 2 decimal places.)
 Change in productivity %