This type of light production is an example of energy being transformed into light energy.

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.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

If y gets smaller as x gets bigger and y have an relationship?