How can natural disasters produce social and cultural change?

What was different about warfare in the early 1800s and early 1900s?

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group. no, this does not need to be reported since it is unrelated to participation in the study. no, this does not need to be reported because two weeks have passed. no, this does not need to be reported since the subject recovered.

The graph shows excess demand. which needs to happen in order to stop disequilibrium from occurring? q needs to be coordinated with supply. q needs to be coordinated with demand. the price of goods needs to be increased. the price of goods needs to be decreased.