Sound is an example of ?
a. a longitudinal wave.
b. a wave that can travel through a vacuum.
c. a transverse wave.
d. a wave that does not transmit energy.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.