The intensity of a spherical wave is defined as the power of the wave summed over an entire imaginary surface divided by the area of that imaginary surface. What relationship does this mean exists between intensity and wave amplitude

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge