Explain whether the benefits outweigh the weaknesses of the dam described in the following scenario and provide an argument in favor of or against the project. Situation: Farmers in a small South American country have to cope with the spring Amazon River floods. They would like the government to build a dam that would control flooding and provide hydroelectricity. However, they are concerned about the effects it would have on the ecosystem, possibly causing severe erosion and impacting species survival.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

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

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false