What is the regular rising and falling of ocean water due to the gravitational pull of the sun and moon?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

The material that keeps its new shape after it is stretched is called?

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?