consider a throw ball to the air ,whre lagragian is given by ,L( m /2+Y^ '2 +Z^' 2 ]- msz, find the two concider momuntum when it is invariant under translation at x&x+E and y&yE(both x and y are cyclic cordinate)

harry byrd declared organized resistance by southern states would prevent racial integration.

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

+15-35=-20

going in opposite directions