You have a special lightbulb with a very delicate wire filament. the wire will break if the current in it ever exceeds 1.90 a , even for an instant. what is the largest root-mean-square current you can run through this bulb?

Could someone me find the answer to this problem.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

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?