Chemical reaction to make a foam?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

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