The question is in the picture

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 jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

What part of the ear is names after tools, such as the hammer and the anvil?