In step two of experiment 4, you add sodium hydroxide to copper(ii) nitrate and use a stirring rod to test if the solution is basic. how do you establish whether the solution is basic? (explain what else is needed, what observations are made, and what should be observed if the solution is basic).

Acriterion for waiving informed consent is that, when appropriate, subjects are provided additional pertinent information after the study. in which of the following studies would it not be appropriate to provide subjects with information about missing elements of consent: a study in which researchers told students that they would be given a quiz after reading some study materials when the researchers did not intend to use a quiz, but were attempting to focus subjects’ attention on the material. a study in which subjects were told that they performed in the third quartile on an anagram task when in reality students were randomly assigned scores that were not related to their actual performance. a study in which subjects were assigned to study activities based on an undesirable or unflattering physical characteristic as assessed by members of the research team. a study involving decision-making games in which subjects were led to believe that they were interacting with another student in another room, but were actually interacting with a computer programmed to provide consistent responses to all subjects.

What percentage of roads in germany have no speed limit?

Which of the following most likely contributed to the outbreak of world war ii? a. embargoes on international trade b. higher tariff rates in european countries c. sanctions imposed by the united states d. global economic depression