An experimenter wants to study the relationship between caffeine and reaction time. She assigns participants as follows: Group One receives 50 milligrams of caffeine; Group Two receives 100 milligrams of caffeine; Group Three receives 200 milligrams of caffeine; Group Four receives no caffeine. Twenty minutes later, all participants complete the reaction-time test. In this experiment, what was the dependent variable?

a. Amount of caffeine
b. No caffeine
c. Reaction time
d. Assignment into one of four groups

Why does the supreme court only listen to a small percentage of cases every year?

Norman jones, an economic historian at the university of utah, has described the views of the ancient greek philosopher aristotle on interest: aristotle defined money as a good that was consumed by use. unlike houses and fields, which are not destroyed by use, money must be spent to be used. there- fore, as we cannot rent food, so we cannot rent money. moreover, money does not reproduce. a house or a flock can produce new value by use, so it is not unreasonable to ask for a return on their use. money, being barren, should not, therefore, be expected to produce excess value. thus, interest is unnatural. what did aristotle mean in arguing that money is “barren”? why would money being barren mean that lenders should not charge interest on loans? do you agree with aristotle’s reasoning? briefly explain.

In the 1830s which mountain man encouraged americans to move to california with stories of its rich soil warm sun and friendly people a) joseph walker b) joseph smith c) jedidiah smith d) james beckwourth