1. This type of scale is designed to weigh the difference between a set mass and an ingredient. The process involved with properly using this scale is a delicate one and when it is achieved, the measurement is very, very precise, which makes this scale a good choice for baking. What type of scale is being described here?

Can someone me with questions 15 to 17 plz.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

The fact that the total amount of energy in a system remains constant is a(n)