Suppose that intelligent life in other parts of the universe were able to perceive parts of the electromagnetic spectrum which are invisible to us. If such creatures used 1 to 2 meter radio waves, would they then be able to "see" our FM radio broadcasts? If they respond to radiation at those wavelengths, would you guess that these creatures were much larger or much smaller than us? Do you think they could they detect small objects, such as a penny

Explanation:

The intelligent life in other parts of a universe could be aliens or some sort of animals who are able to perceive parts of electromagnetic spectrum which are invisible to us.

To be able to see FM radio broadcasts who would need to used  about 1 to 2 meter radio waves therefore this intelligent life can " see " our FM radio broadcasts and they are definitely larger in size when compared to humans to be able to posses such qualities.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."