How many oxygen atoms in the formula Ba3(PO4)2

State the right hand rule of the direction of magnetic field in a conductor carrying current

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.

How many neutrons does plutonium -196 with an atomic number of 78.