a large flat horizontal sheet of charge has a charge per unit area of ​​0.2 c/m², find the electric field just above the middle of the sheet?? ​

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

This is the substance(s) formed in a chemical reaction.

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?