A positive point source charge of +1.0 nC is located at the…

A positive point source charge of +1.0 nC is located at the xy coordinate of (-2,0), where x and y are both in meters. A second point source charge of +1.0 nC is located at the coordinate (0,-2). In evaluating the net electric force on a test charge of -2.0 C at the origin (0,0), calculate the net electrical force on the -2.0 C charge.

A researcher observed variation in plasma testosterone hormo…

A researcher observed variation in plasma testosterone hormone levels in birds that was associated with variation in aggression: birds with higher levels of testosterone were more aggressive. In addition, experimental addition of testosterone increased an individual’s level of aggression. Which of the following is/are correct about this work? You can choose more than one.