A metal ball of mass 5 kg falls from a height of 490m. how much time it will take to reach the ground (g=9.8m/s square)​

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Connect the whole numbers on the periodic table to indicate what they represent?

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.