If you see orange construction signs and cones on a freeway, you must:

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

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?

Energy conservation is the process by which one kind of energy changes into a another and when energy is converted this way it's not lost or used up. true or false