After rutherford bombarded gold foil with alpha particles, he concluded that the volume of an atom is mostly empty space. which observation led rutherford to this conclusion? 1) some of the alpha particles deflected 180 degrees 2) the paths of deflected alpha particles were hyperbolic 3) many alpha particles were absorbed by gold nuclei 4) most of the alpha particles were not deflected

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

In a copper wire, a temperature increase is the result of which of the following

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas