-- If you are not attached to either of those light waves, then
you see each of them moving at the speed of 'c'.
-- If you are attached to either one and traveling with it, then
you see the other one approaching you at the speed of 'c'.
river watershed
Equilibrant vector is the opposite of resultant vector, they act in opposite directions to balance each other.
Equilibrant vector is the opposite of resultant vector, they act in opposite directions to balance each other.
The amount of damage relates to the relative motion of the two cars. So, if the cars are moving in opposite directions when they collide, the relative motion and the resulting damage is greater; if they are moving in the same direction, then the relative motion and the resulting damage is less. A motionless car is intermediate between a car moving in the same direction and a car moving in an opposite direction.
46
The wheels of a vehicle may rotate in different directions if they have a system that is called "spur-gear differential." Pinion pairs are displaced axially, and mesh part of the length between two spur gears, results in rotation in opposite directions.
Pulling on a line between two forces creates "tension" in the line.
the directions are opposite to each other
the directions are opposite to each other
The in between directions are called intermediate directions.
A road with a median strip between the traffic in opposite directions and typically two or more lanes in each direction.
Hysteresis