What material or metal is this: 10 cm * 12 cm * 4,25 cm. It weighs 6 kgs. It's not magnetic. I got it from my mothers heritage.

Which of the following mining methods disrupts the sea floor?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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.