In your opinion why are sources more valued than others?

it's science

At what time will the interfering waves have an amplitudeof zero?

Is a volume of space that is empty of matter.

Which statements best describe energy? check all that apply. the total amount of energy in the universe remains constant. the total amount of energy in the universe changes constantly. energy cannot be converted from one form to another. energy can be converted from one form to another. energy cannot be created or destroyed. energy can be created or destroyed.