Auditory processing disorder (also known as central auditory processing disorder or CAPD) is a condition that makes it hard for kids to recognize subtle differences between sounds in words. It affects their ability to process what other people are saying.
Gallium is a solid metal at room temperature, but it melts in your hands. 00:09. When gallium is in its liquid state, if feels like cold melted solder in your hands. 00:33. Melting gallium onto aluminum makes the aluminum brittle enough to break with your fingers.
Solder is the small piece of alloyed metal that is melted in order to fuse two other pieces of metal together. The place where the metals are fused by solder is called a joint. The solder metal is of a lower melting temperature than the two pieces itâs fusing. Solder comes in three types: hard, medium, and easy. All three types have different melting temperatures. Hard solder melts at a high temperature, medium melts at a lower temperature, easy melts at an even lower temperature.