Two halves of a mold (cope and drag) are weighted down to keep them from separating due to the pressure exerted by the molten metal. consider a solid, spherical casting, 20 cm in diameter, that is being produced by sand casting. the riser used in the process is open to the atmosphere. each flask is 50 cm by 50 cm and 35 cm deep. the parting line is at the middle of the part.
(a) estimate the clamping force required to prevent separation of the cope and drag. assume the molten metal is aluminum and the cope and drag are made using silica sand.
(b) would the position of the parting line influence the clamping force required? explain.

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.