How can a sample of uranium-235 that has critical mass be induced to react? it must be spilt with a laser. it must be fused to a helium nucleus. it must be bombarded with neutrons. it must be shot with light speed electrons?

What causes most sediment to wash or fall into a river

Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.