The correct answer should be <span>A. If you see a wear bar across the width of the tread, it's time to change the tire
This is an incorrect sentence because you should change a tire before you see the wear bar. At the time you see the bar, you should've already changed it. </span>
C. Negative force. The dog isn't going to learn that way.
Answer:
The distance between the two charges is =4.4mm