Make a list of each main phase of the moon, describing roughly when the moon rises and sets for each phase. during which phase can you see the moon in the middle of the morning? in the middle of the afternoon?

Which device uses ac current to operate?

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?

What is friction? how does it affect the motion of an object?