Professors chase and sanborn are conducting an experiment on the effects of caffeine on memory. participants are randomly assigned to a caffeine or a no-caffeine group and their recall of items on a word list is later assessed. which pair below correctly names and identifies the variables in this experiment?

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?