Abike travels at a constant speed of 3.1 m/s for 6 s. how far does it go?

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.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

What’s #16 asking me and how do i solve it?