You are assigned to select a new 5hp motor for an industrial facility. the motor will operate at essentially rated load for two shifts a day, five days a week. you have a couple of options, a nepact motor with an efficiency of 88.2% and a cost of $235 or a nema premium motor with an efficiency of 90.5% and a cost of $320. power costs a $0.10/kwh. how long is the payback period for the higher efficiency motor? what would be the cost savings over the 20-year lfe of the motor?

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c