If you were to cut a small permanent bar magnet in half, A. one piece would be a magnetic north pole and the other piece would be a south pole. B. neither piece would be magnetic. C. each piece would in itself be a smaller bar magnet with both north and south poles. D.

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

When an object is heated it contracts. a. true b. false

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o