Which method is used to obtain common salt from rock salt? Why?

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Which statement best describes the flow of energy in this scenario