josh stroed an electric potential energy of 2.5J in a vacuum of 1m³ by a field E. if the field is reduced to ¹/4 of its initial value, how much energy is stored per cubic meter​

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?