An ice pack and a room temperature cola can are sealed inside an insulated container. Energy can transfer among the can, the ice pack and the inside of the container, but cannot leave the container. What type of system is this?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.