Convection is . A. When particles transfer energy by touching.
B. None of these
C. When the sun warms an object.
D. The flow between warm and cool sections of a fluid.

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.