While john is traveling along a straight interstate highway, he notices that the mile marker reads 252 km. john travels until he reaches the 134 km marker and then retraces his path to the 163 km marker. what is john’s resultant displacement from the 252 km marker? answer in units of km.

total distance is  147 km

and john displacement is = 89 km

Explanation:

given data

mile marker = 252 km

reach = 134 km

retrace path = 163 km

to find out

resultant displacement

solution

we know here john travel from 252 km mark

and he reach at 134 km

so he travel distance part1 = 252 - 134

distance d1 = 252 - 134 = 118 km    1

and

then he start travel from 134 km mark upto 163 km mark

so distance travel in part 2 is

distance d2 = 163 - 134 = 29 km    2

so total distance is 118 + 29 = 147 km

and john displacement is = 252 - 163 = 89 km

b) phosphorus pentoxide

3.2x10^7