The hypothesis that men in high stress jobs have an increased risk of developing coronary heart disease was tested during an 18-year follow-up study from 1965-1983 of a group of 7,909 men of Japanese ancestry in Hawaii. Of the 7,909 men who completed the first examination at baseline, 4,673 were free of prevalent coronary heart disease (CHD), stroke, and cancer for the duration of the study, while 3,236 had incident CHD. Of the 4,579 men with higher stress jobs, 1,440 of them developed CHD; of the men with lower stress jobs, 1,796 of them developed CHD. What is the study design

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the animal that would be cutest if scaled down to the size of a cat? elephant

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.