This image represents the along with its . A) element carbon; electrons lost B) ion of carbon; gained electrons C) element carbon; valence electrons D) molecule of carbon; electron arrangement

Energy flows from the producer level to the level. is called

In which of the following is positive work done by a person on a suitcase

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.