Hơi nước quá nhiệt bị đoạn nhiệt sẽ trở thành

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?