A train took 7 hours to complete its journey . For the first 3 hours it's average speed was 155km/h , for the remaining travel , the average speed was 186 km/h , what was the total distance ?

1395km

Explanation:

distance= speed×time

First three hours.

155×3= 465km

Remaining travel

7hours-3hours= 5hours as the time for remaining travel.

5×186= 930km

Total distance = 465km+930km= 1395km

Answer is c because in exothermic reactions, energy releases.in cellular respiration,atp+h20 (water) = adp+ pi + energyso celullar respiration is exothermic and releases energy

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.