Adrug company performed a study to test the effectiveness of a new headache medicine. the researchers grouped the patients into two different groups. one group was given the pills that contained the new medicine. the other group were given pills that did not contain the new medicine. why did the researchers not tell the patients which pill they were given?

When would a bouncy ball have the most potential energy

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.