You throw a ball so that it hits the floor a few feet in front of you . Will it bounce back to you? Explain how the bounce is similar to the way waves behave , and what law it should obey .

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What is the temperature of one mole of helium gas at stp?

What is i fracture in the crust called when land move up, down or sideways