Two trains are travelling on parallel tracks. Imagine that you are travelling on Train A. Train A travels 12 m/s. Train B is travelling at 20 m/s in the same direction but on a different set of tracks. a At the point when train B is passing train, describe the speed and direction of the train B as it appears to you.​

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above