How many calories are there in 4x103 joules of energy?

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.

Which three statements represent the benefits of performing experiments using computer simulations?

What is happening when the water inside a kettle heats up and begins to boil