How much heat must be added to raise a sample of 100.g of water at 270K to 280K?

What type of reaction fuels the processes seen here?

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.

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse