11. the optimum shape of a riser is spherical to ensure that it cools more slowly than the casting it feeds. spherically shaped risers, however, are difficult to cast. (1) sketch the shape of a blind riser that is easy to mold, but also has the smallest possible surface area-to-volume ratio. (2)compare the solidificationtime of the riser in part (a) to that of a riser shaped like a right circular cylinder. assumethat the volume of each riser is the same, and that for each the height is equal to the diameter.

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answer:

design model: consists of design geometry; can be 2d or 3d; typically has a black background.

design files: drawing created with microsoft expression design, a drawing and design program for windows; may contain both vector and raster graphics; can also include multiple layers and various image effects.

elements: an element is a single part of a larger group.

answer:

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