What is the difference between an open mold and a closed mold?
"A closed mold is open to the atmosphere at the top; it is an open container in the desired shape which must be flat at the top. An open mold has a cavity that is entirely enclosed by the mold, with a passageway (called the gating system) leading from the outside into the cavity. "Molten metal is poured into this gating system to fill the mold.

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0