Two runners race eachother around a circular track. the track is 500 meters long and 159 m across (the diameter of the circle). runner a trips at the halfway mark and doesnt get up. runner b finishes the race. which runner has displacement? which ran the greates distance?

Let us consider the definition of distance and displacement so that we can have a better idea about the two situations

a) Distance is a scalar quantity and it signifies the overall ground covered by a  n object irrespective of its direction, initial and final position

b) displacement is a vector quantity and it signifies how far the object moved from its original position.

now let us see the scenario with a pictorial representation (Figure 1)

Thus the greater displacement is by Runner A [maximum difference in ground cover from the start point ]

The greatest distance is by Runner B [covered the complete track]

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

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