Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

19.37 kmph is the ‘average speed’ of the train.

Explanation:

To find the average speed of the train we know that the average speed is ratio of total distance traveled to the total time taken. From the given question, The total distance traveled by the train is 74 + 81 = 155 kilometers and the total time taken to travel the distance is 3 + 5 = 8 hours. substitute the values accordingly.

Thus, the average speed of the train is 19.37 kmph.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

answersilicon (si); oxygen (o);