Which of the following processes start with a material that is in a fluid or semifluid state and solidifies the material in a cavity (two best answers): a. pressing b. forging c. casting d. machining e. turning f. molding

a) Casting and d) molding

For the first case, casting can be defined as the process of manufacturing parts, commonly metallic but also plastic, consisting of melting a material and introducing it into a cavity (emptying, molding), called a mold, where it solidifies.

In the second case, molding is the manufacturing process by molding liquid or flexible raw material using a matrix. This mold is nothing more than a hollow model that is filled with liquid material such as plastic, glass, metal or any ceramic raw material that will subsequently harden.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.