Ameasure of the total amount of matter an object contains is called

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

The air that we breath is made mostly of which gaseous molecule

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?