Does mercury have any reconnaissance satellites? (science)

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

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.

How might this scientific phenomena be explained? a paper clip floats on water.