Something that slows the flow of electrons is called

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked

What is offspring? why does a longer life span mean a higher chance of producing offspring?