Opposite Rays
Because we can't see the image you're referring to, we can't give the answer to which ray is opposite to BA. However, we can help. Opposite rays are two rays that both start from a common point and go off in exactly opposite directions. So, if there are two rays (BA and BC) with a common endpoint (B) going in different directions, they are called opposite rays.
they attract if they go opposite directions they repel
What two forces? If two forces go in opposite directions, and have the same magnitude, they will be balanced. Otherwise they wont'.
Yes they go in opposite directions and Repel. For example if you have two magnets and point the South and South together they will repel each other.
No, because velocity includes direction as well as speed.In order for the velocities to be the same, they would have to go the same speed in the same direction.
because one is a troll
The diverging plates move away from one another in opposite directions.
Yes, just reverse the blades on one of the windmills. Another possibility could involve the *size* of the property referred to. For example windmills located at opposite ends of Austrialia might well turn in different directions.
A decagon cannot be a parallelogram. In a parallelogram, the opposite sides are parallel to each other. in a decagon, some of the opposite sides would go in different directions.
Did you mean "why do the arrows point in different directions?" if so, the answer is that, since electrons are both negatively charged, the will repel from each other, causing one to go in one direction, and the other opposite that. Think "Pauli exclusion principle" which states "no two electrons in the same atom can be in the same quantum state." This 'state' includes spin, and the arrows represent the spin of the electron orbit. I hope this helped!
Because that's what "absolute value" means. It's the size of the number regardless of which direction the number goes ... positive or negative. +42 and -42 go in opposite directions, but they're the same size. So they have the same absolute value.
You cannot, since there is no information on how far along you go. In actual fact, a line has no end-points, it is infinite in both directions.