10.09 grams of gravel are placed into a graduated cylinder which initially contains 53.2 mL of water. If the water level rises to 59.2 mL, what is the density of the gravel?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Which three statements represent the benefits of performing experiments using computer simulations?

Helium decays to form lithium. which equation correctly describes this decay?