Energy cycles through ecosystems because it returns to the Sun.
True
or
False

How does velocity and mass affect momentum?

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.

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?