While john is traveling along a straight interstate highway, he notices that the mile marker reads 241 km. john travels until he reaches the 134 km marker and then retraces his path to the 167 km marker. what is john’s resultant displacement from the 241 km marker?

Displacement of john will be 74 km                  

Explanation:

We have given that firstly john notice that mile marker reads 241 km

Then he go to 134 km km marker and then return back to 167 km marker point

We know that when we deal with displacement then we consider only initial and final point we don't consider total path traveled

Here initial point is 241 km marker and final point is 167 km marker

So displacement will be 241 - 167 = 74 km

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.