You drop a pebble down a well. You hear a splash 2.8s later. Ignoring air resistance, How deep is the well? Assume g = 9.8 m/s/s

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.

What is the amount of energy for a photon that has a 125 cm wavelength

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.