Aweatherproof metal junction box measuring 4 m. × 4 m. × 6 in, has been installed to support a luminaire. two rigid metal conduits have been threaded wrenchtight into the threaded entries of the enclosure. the box has not yet been secured to the brick wall. but both conduits have been strapped to the wall 16 in. from the box. what additional support (from the following list) is required for this box? 1. two metal screws with plastic anchons il. two toggle bolts ih. two drive pins

a) none
b) i or il only
c) i or ill only
d) i. ii, or iii 10.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?