Which causes the production of vitamin d in humans? a. ultraviolet rays b. radio waves c. gamma rays d. x-rays

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

What is the relationship between globular clusters and the milky way?

What happens during the fall in september