tephanie is trying to see how fast she can run the 100 meter dash. After a few practice runs, she runs her best 100 meter dash in 10.28 seconds. What was Stephanie’s average speed while running the 100 meter dash? Round your calculation to the nearest tenth.

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.