What type of events are usually the most visible and inflammatory examples of racism and brutality perceived to be employed by the police in many minority neighborhoods

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

1.3.3 quiz: primary and secondary sourcesquestion 4 of 102 pointsa secondary source is reliable and credible if the person who created thesource is an expert on the topic, is educated and respected in the field ofstudy, and:

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.