Which of the following is an example of a mixture a. chlorine b. sugar c. water d. milk

an example of a mixture is D. Milk

It contains several ingredients.

-hails tea

explanation:

-t poses

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.