'<em>Distance</em>' is how far you walk on your afternoon walk, while you cut across the park, go two blocks out of your way to visit a friend, and cross the street several times in both directions to avoid some big-looking dogs. Every step counts for distance. Distance only has a size but no direction, because the direction could change a hundred times during the trip. And from the time you leave home until you return home, the distance could be 5 miles or more.
'<em>Displacement</em>' is very different. Displacement is just the straight-line distance between the starting point and the end point, <em>regardless of the route</em> that was followed between them. It has a size ... the distance between them, and it also has a direction ... the direction from start to finish. And if you start out from home and return home, then your displacement for that trip is zero, because there's <em>no</em> straight-line distance from the starting point to the end point.
<span>Boyle's Law, in short, states that the volume of a gas is inversely proportional to its pressure AS LONG AS THE TEMPERATURE REMAINS UNCHAnged </span>
Please see below as the answer is self-explanatory.
Explanation:
If the potential at B is lower than A, and the potential at C is lower than B, this means that there is an electric field, directed from A to C.
If a positively-charged particle is released at rest at point B, it will be accelerated by the electric field (which is a force per unit charge, so it produces an acceleration) in the same direction than the field (because it is a positive charge) towards point C.
