Calculate the gradient
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Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

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.

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system