The scientifically accepted value of the density of pure ethanol is 0.7893 g/mL. A student measurement (aka experimental value) for the density of ethanol is 0.81 g/mL. What is the percent error?

answer: lol

explanation:

lol

i don,t know so just answer mine

answer;

18.5 seconds

explanation;

velocity is distance covered per unit time; it is given by displacement divided by time.

thus; time = displacement/velocity

total time = total displacement/velocity

total distance = 5000 meters south

total time = 5000/4.5

                  = 1111.11 seconds

but; 1 minute = 60 sec

thus; 1111.11 /60

                = 18.51 seconds

thus; the time taken is 18.5 seconds