How does the reaction demonstrate the laws of conservation of charge and conservation of nucleon number?

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Observations show that interstellar clouds can have almost any shape and

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2